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/check-go-dependencies-task.yml

@@ -111,7 +111,7 @@ jobs:
       # Some might find it convenient to have CI generate the cache rather than setting up for it locally
       - name: Upload cache to workflow artifact
         if: failure() && steps.diff.outcome == 'failure'
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           if-no-files-found: error
           include-hidden-files: true

.github/workflows/publish-go-tester-task.yml

@@ -138,7 +138,7 @@ jobs:
 
       # Transfer builds to artifacts job
       - name: Upload build artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           path: ${{ env.DIST_DIR }}/${{ matrix.os.path }}
           name: ${{ matrix.os.artifact-name }}
@@ -168,7 +168,7 @@ jobs:
           done
 
       - name: Upload checksum artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           path: ./*checksums.txt
           name: checksums

.github/workflows/release-go-crosscompile-task.yml

@@ -77,7 +77,7 @@ jobs:
         run: task dist:${{ matrix.os.task }}
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           if-no-files-found: error
           name: ${{ env.ARTIFACT_PREFIX }}${{ matrix.os.artifact-suffix }}
@@ -194,7 +194,7 @@ jobs:
           -C ../../ LICENSE.txt
 
       - name: Upload notarized artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           if-no-files-found: error
           name: ${{ env.ARTIFACT_PREFIX }}${{ matrix.build.artifact-suffix }}

.github/workflows/sync-labels.yml

@@ -74,7 +74,7 @@ jobs:
           file-url: https://raw.githubusercontent.com/arduino/tooling-project-assets/main/workflow-templates/assets/sync-labels/${{ matrix.filename }}
 
       - name: Pass configuration files to next job via workflow artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           path: |
             *.yaml