Bump actions/upload-artifact from 5 to 6 in the all group

Bumps the all group with 1 update: [actions/upload-artifact](https://github.com/actions/upload-artifact).


Updates `actions/upload-artifact` from 5 to 6
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all
...

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

Author: dependabot[bot]

.github/workflows/gradle.yaml

@@ -33,7 +33,7 @@ jobs:
 
       - name: Store reports
         if: always() && (steps.gradle-build.outcome == 'success' || steps.gradle-build.outcome == 'failure')
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: linux-reports
           path: build/reports/
@@ -72,7 +72,7 @@ jobs:
 
       - name: Store reports
         if: always() && (steps.gradle-build.outcome == 'success' || steps.gradle-build.outcome == 'failure')
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: gradle-${{ matrix.gradle }}-tests
           path: build/reports/tests/test/
@@ -110,7 +110,7 @@ jobs:
 
       - name: Store reports
         if: always() && (steps.gradle-build.outcome == 'success' || steps.gradle-build.outcome == 'failure')
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: jdk-${{ matrix.java }}-tests
           path: build/reports/tests/test/
@@ -141,7 +141,7 @@ jobs:
 
       - name: Store reports
         if: always() && (steps.gradle-build.outcome == 'success' || steps.gradle-build.outcome == 'failure')
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: gradle-${{ matrix.gradle }}-tests
           path: build/reports/tests/integrationTest/
@@ -176,7 +176,7 @@ jobs:
 
       - name: Store reports
         if: always() && (steps.gradle-build.outcome == 'success' || steps.gradle-build.outcome == 'failure')
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: jdk-25-tests
           path: build/reports/tests/test/