chore(deps): update github artifact actions to v6

.github/workflows/docker-build.yml

@@ -182,7 +182,7 @@ jobs:
 
       - name: Upload Image Artifact
         if: github.event_name == 'pull_request'
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: pr-image-${{ github.event.pull_request.number }}
           path: /tmp/charon-pr-image.tar
@@ -650,7 +650,7 @@ jobs:
 
       - name: Upload Artifacts
         if: always()
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: supply-chain-pr-${{ github.event.pull_request.number }}
           path: |

.github/workflows/playwright.yml

@@ -19,7 +19,7 @@ jobs:
       run: npx playwright install --with-deps
     - name: Run Playwright tests
       run: npx playwright test
-    - uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5
+    - uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
       if: ${{ !cancelled() }}
       with:
         name: playwright-report

.github/workflows/supply-chain-verify.yml

@@ -154,7 +154,7 @@ jobs:
 
       - name: Upload SBOM Artifact
         if: steps.image-check.outputs.exists == 'true' && always()
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4  # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f  # v6.0.0
         with:
           name: sbom-${{ steps.tag.outputs.tag }}
           path: sbom-generated.json
@@ -326,7 +326,7 @@ jobs:
 
       - name: Upload Vulnerability Scan Artifact
         if: steps.validate-sbom.outputs.valid == 'true' && always()
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4  # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f  # v6.0.0
         with:
           name: vulnerability-scan-${{ steps.tag.outputs.tag }}
           path: |