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] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -167,7 +167,7 @@ jobs:
         cp $(cabal list-bin mempool-bench) mempool-bench
 
     - name: Upload benchmark executables
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: benchmark-exes-${{ runner.os }}-${{ matrix.ghc }}
         path: mempool-bench
@@ -195,7 +195,7 @@ jobs:
         github.event_name == 'push'
         && github.ref == 'refs/heads/main'
         && matrix.ghc=='9.10.2'
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: haddocks
         path: haddocks.tgz
@@ -258,7 +258,7 @@ jobs:
     # TODO: this will be necessary when we publish the benchmarks results.
     # - name: Upload mempool benchmark baseline results
     #   if: github.event_name == 'push' && github.ref == 'refs/heads/main'
-    #   uses: actions/upload-artifact@v4
+    #   uses: actions/upload-artifact@v5
     #   with:
     #     name: baseline-mempool-benchmarks
     #     path: baseline-mempool-benchmarks.csv