Bump actionpack from 7.0.8.4 to 7.0.8.7 in /examples/stacks/rails/blog #6672

Job	Run time
Test Flake Build	1m 30s
Spell Check with Typos	8s
golangci-lint (ubuntu-latest)	35s
build-devbox (ubuntu-latest)	30s
golangci-lint (macos-13)	5m 9s
build-devbox (macos-13)	1m 4s
auto-nix-install (ubuntu-latest, true)	43s
test-nix-versions (ubuntu-latest, 2.15.1)	49s
auto-nix-install (ubuntu-latest, false)	42s
test-nix-versions (ubuntu-latest, 2.16.1)	43s
test-nix-versions (ubuntu-latest, 2.17.0)	39s
auto-nix-install (macos-13, true)	3m 9s
test-nix-versions (ubuntu-latest, 2.18.0)	38s
test (not-main, ubuntu-latest, project-tests-only, 2.12.0)	9m 36s
auto-nix-install (macos-13, false)	4m 43s
test-nix-versions (ubuntu-latest, 2.19.2)	38s
test (not-main, ubuntu-latest, project-tests-only, 2.19.2)	9m 25s
test-nix-versions (ubuntu-latest, 2.24.7)	42s
test (not-main, ubuntu-latest, project-tests-only, 2.20.1)	8m 43s
test-nix-versions (macos-13, 2.15.1)	2m 21s
test (not-main, ubuntu-latest, project-tests-off, 2.12.0)	10m 33s
test-nix-versions (macos-13, 2.16.1)	3m 32s
test (not-main, ubuntu-latest, project-tests-off, 2.19.2)	10m 1s
test-nix-versions (macos-13, 2.17.0)	2m 24s
test (not-main, ubuntu-latest, project-tests-off, 2.20.1)	9m 42s
test-nix-versions (macos-13, 2.18.0)	3m 18s
test-nix-versions (macos-13, 2.19.2)	2m 47s
test-nix-versions (macos-13, 2.24.7)	3m 22s
	1h 38m 6s

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