Bump anchore/scan-action from 5 to 6

Bumps [anchore/scan-action](https://github.com/anchore/scan-action) from 5 to 6.
- [Release notes](https://github.com/anchore/scan-action/releases)
- [Changelog](https://github.com/anchore/scan-action/blob/main/CHANGELOG.md)
- [Commits](anchore/scan-action@v5...v6)

---
updated-dependencies:
- dependency-name: anchore/scan-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/vuln-scans.yml

@@ -41,7 +41,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
-      - uses: anchore/scan-action@v5
+      - uses: anchore/scan-action@v6
         with:
           severity-cutoff: "high"
           only-fixed: true
@@ -150,7 +150,7 @@ jobs:
           name: otelcol-${{ matrix.ARCH }}${{ matrix.FIPS == true && '-fips' || '' }}
           path: ./dist
       - run: docker load -i ./dist/image.tar
-      - uses: anchore/scan-action@v5
+      - uses: anchore/scan-action@v6
         with:
           severity-cutoff: "high"
           only-fixed: true
@@ -193,7 +193,7 @@ jobs:
           docker build -t otelcol-windows --pull --build-arg BASE_IMAGE=${base_image} --build-arg JMX_METRIC_GATHERER_RELEASE=$(Get-Content packaging\jmx-metric-gatherer-release.txt) -f .\cmd\otelcol\Dockerfile.windows .\cmd\otelcol\
           Remove-Item .\cmd\otelcol\otelcol.exe
           Remove-Item .\cmd\otelcol\agent-bundle_windows_amd64.zip
-      - uses: anchore/scan-action@v5
+      - uses: anchore/scan-action@v6
         with:
           severity-cutoff: "high"
           only-fixed: true