Bump actions/upload-artifact from 4 to 5

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 5.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v5)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/playground.yml

@@ -25,7 +25,7 @@ jobs:
           echo hase >app/app2
 
       - name: Upload binaries built by go-releaser
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: go-releaser-binaries
           path: app/

.github/workflows/release.yml

@@ -58,7 +58,7 @@ jobs:
           mv -v dist/polly_linux_arm64_v8.0/polly app/linux/arm64/polly
 
       - name: Upload binaries built by go-releaser
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: go-releaser-binaries
           path: app/
@@ -179,7 +179,7 @@ jobs:
           echo "PLATFORM_SLUG=${platform//\//_}" >> "$GITHUB_ENV"
 
       - name: Upload docker image digest
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           # as of upload-artifact@v4, artifact name must be unique (and must NOT contain a slash :-))
           # https://github.com/actions/upload-artifact/issues/478#issuecomment-1885470013