build(deps): bump github.com/grpc-ecosystem/grpc-gateway/v2

Bumps [github.com/grpc-ecosystem/grpc-gateway/v2](https://github.com/grpc-ecosystem/grpc-gateway) from 2.20.0 to 2.21.0.
- [Release notes](https://github.com/grpc-ecosystem/grpc-gateway/releases)
- [Changelog](https://github.com/grpc-ecosystem/grpc-gateway/blob/main/.goreleaser.yml)
- [Commits](grpc-ecosystem/grpc-gateway@v2.20.0...v2.21.0)

---
updated-dependencies:
- dependency-name: github.com/grpc-ecosystem/grpc-gateway/v2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

tools/mod/go.mod

@@ -1,9 +1,6 @@
 module go.etcd.io/etcd/tools/v3
 
 go 1.22.4
-
-toolchain go1.22.5
-
 require (
 	github.com/alexfalkowski/gocovmerge v1.3.9
 	github.com/appscodelabs/license-bill-of-materials v0.0.0-20220707232035-6018e0c5287c
@@ -13,7 +10,7 @@ require (
 	github.com/golangci/golangci-lint v1.59.1
 	github.com/google/addlicense v1.1.1
 	github.com/google/yamlfmt v0.13.0
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.21.0
 	go.etcd.io/gofail v0.2.0
 	go.etcd.io/protodoc v0.0.0-20180829002748-484ab544e116
 	go.etcd.io/raft/v3 v3.6.0-alpha.0
@@ -220,8 +217,8 @@ require (
 	golang.org/x/term v0.22.0 // indirect
 	golang.org/x/text v0.16.0 // indirect
 	golang.org/x/tools v0.22.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20240528184218-531527333157 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240701130421-f6361c86f094 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240723171418-e6d459c13d2a // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240723171418-e6d459c13d2a // indirect
 	google.golang.org/grpc v1.65.0 // indirect
 	google.golang.org/protobuf v1.34.2 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect

tools/mod/go.sum

@@ -208,8 +208,8 @@ github.com/gostaticanalysis/nilerr v0.1.1/go.mod h1:wZYb6YI5YAxxq0i1+VJbY0s2YONW
 github.com/gostaticanalysis/testutil v0.3.1-0.20210208050101-bfb5c8eec0e4/go.mod h1:D+FIZ+7OahH3ePw/izIEeH5I06eKs1IKI4Xr64/Am3M=
 github.com/gostaticanalysis/testutil v0.4.0 h1:nhdCmubdmDF6VEatUNjgUZBJKWRqugoISdUv3PPQgHY=
 github.com/gostaticanalysis/testutil v0.4.0/go.mod h1:bLIoPefWXrRi/ssLFWX1dx7Repi5x3CuviD3dgAZaBU=
-github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0 h1:bkypFPDjIYGfCYD5mRBvpqxfYX1YCS1PXdKYWi8FsN0=
-github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0/go.mod h1:P+Lt/0by1T8bfcF3z737NnSbmxQAppXMRziHUxPOC8k=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.21.0 h1:CWyXh/jylQWp2dtiV33mY4iSSp6yf4lmn+c7/tN+ObI=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.21.0/go.mod h1:nCLIt0w3Ept2NwF8ThLmrppXsfT07oC8k0XNDxd8sVU=
 github.com/hashicorp/go-version v1.2.1/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
 github.com/hashicorp/go-version v1.7.0 h1:5tqGy27NaOTB8yJKUZELlFAS/LTKJkrmONwQKeRZfjY=
 github.com/hashicorp/go-version v1.7.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
@@ -686,10 +686,10 @@ golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/genproto/googleapis/api v0.0.0-20240528184218-531527333157 h1:7whR9kGa5LUwFtpLm2ArCEejtnxlGeLbAyjFY8sGNFw=
-google.golang.org/genproto/googleapis/api v0.0.0-20240528184218-531527333157/go.mod h1:99sLkeliLXfdj2J75X3Ho+rrVCaJze0uwN7zDDkjPVU=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240701130421-f6361c86f094 h1:BwIjyKYGsK9dMCBOorzRri8MQwmi7mT9rGHsCEinZkA=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240701130421-f6361c86f094/go.mod h1:Ue6ibwXGpU+dqIcODieyLOcgj7z8+IcskoNIgZxtrFY=
+google.golang.org/genproto/googleapis/api v0.0.0-20240723171418-e6d459c13d2a h1:YIa/rzVqMEokBkPtydCkx1VLmv3An1Uw7w1P1m6EhOY=
+google.golang.org/genproto/googleapis/api v0.0.0-20240723171418-e6d459c13d2a/go.mod h1:AHT0dDg3SoMOgZGnZk29b5xTbPHMoEC8qthmBLJCpys=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240723171418-e6d459c13d2a h1:hqK4+jJZXCU4pW7jsAdGOVFIfLHQeV7LaizZKnZ84HI=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240723171418-e6d459c13d2a/go.mod h1:Ue6ibwXGpU+dqIcODieyLOcgj7z8+IcskoNIgZxtrFY=
 google.golang.org/grpc v1.65.0 h1:bs/cUb4lp1G5iImFFd3u5ixQzweKizoZJAwBNLR42lc=
 google.golang.org/grpc v1.65.0/go.mod h1:WgYC2ypjlB0EiQi6wdKixMqukr6lBc0Vo+oOgjrM5ZQ=
 google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=