Bump actions/upload-artifact from 3 to 4

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/publish.yml

@@ -33,7 +33,7 @@ jobs:
         run: poetry build
 
       - name: Upload build files
-        uses: actions/upload-artifact@v3.1.2
+        uses: actions/upload-artifact@v4
         with:
           name: "dist"
           path: "dist/"
@@ -64,7 +64,7 @@ jobs:
             > changelog.txt
 
       - name: Upload release changelog
-        uses: actions/upload-artifact@v3.1.2
+        uses: actions/upload-artifact@v4
         with:
           name: "changelog"
           path: "changelog.txt"

.github/workflows/unit-tests.yml

@@ -42,7 +42,7 @@ jobs:
           mv .coverage .coverage.${{ matrix.platform }}.${{ matrix.python-version }}
 
       - name: Upload coverage artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: coverage
           path: .coverage.${{ matrix.platform }}.${{ matrix.python-version }}