build(deps): bump actions/upload-artifact from 5 to 6

Bumps [actions/upload-artifact](https://github.com/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
...

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

Author: dependabot[bot]

.github/workflows/issue_comment.yml

@@ -37,7 +37,7 @@ jobs:
           JSON_STRING: ${{ steps.issue-parser.outputs.jsonString }}
 
       - name: Save form output as artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: input_form.json
           path: "rdp*.json"
@@ -56,7 +56,7 @@ jobs:
         run: python scripts/issue_comment_templater_rdp.py
 
       - name: Save comment artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: output_comment.md
           overwrite: true

.github/workflows/links_checker.yml

@@ -49,7 +49,7 @@ jobs:
           > linkchecker_report.html
 
       - name: Save report output as artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: ${{ always() }}
         continue-on-error: true
         with:

.github/workflows/pr_checker_build.yml

@@ -101,7 +101,7 @@ jobs:
           tar --zstd -cf artifact.tar.zst pr.env ${{ env.BUILD_DIR }}
 
       - name: Save build website as artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: pr-build-website
           path: artifact.tar.zst