Upgrade actions/upload-artifact v5.0.0 -> v6.0.0 (#2033)

See:
- https://github.com/actions/upload-artifact/releases/tag/v6.0.0
- actions/upload-artifact@v5.0.0...v6.0.0

Author: Picnic-DevPla-Bot

.github/workflows/integration-tests.yml

@@ -78,7 +78,7 @@ jobs:
           JAVA_HOME: "${{ env.JAVA_HOME_21_X64 }}"
       - name: Upload artifacts on failure
         if: ${{ failure() }}
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: "integration-test-${{ matrix.integration-test }}"
           path: "${{ runner.temp }}/artifacts"

.github/workflows/pitest-analyze-pr.yml

@@ -42,7 +42,7 @@ jobs:
       - name: Aggregate Pitest reports
         run: mvn pitest-git:aggregate -DkilledEmoji=":tada:" -DmutantEmoji=":zombie:" -DtrailingText="Mutation testing report by [Pitest](https://pitest.org/). Review any surviving mutants by inspecting the line comments under [_Files changed_](${{ github.event.number }}/files)."
       - name: Upload Pitest reports as artifact
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: pitest-reports
           path: ./target/pit-reports-ci

.github/workflows/suggest-commit-message.yml

@@ -314,7 +314,7 @@ jobs:
             });
             core.info(`Updated comment ${existing.id} by ${originalCommenter}.`);
       - name: Upload suggested commit message
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: suggested-commit-message
           path: /tmp/suggested-commit-message.txt