gha: bump securego/gosec from 2.20.0 to 2.21.1 (#551)

Bumps [securego/gosec](https://github.com/securego/gosec) from 2.20.0 to 2.21.1.
- [Release notes](https://github.com/securego/gosec/releases)
- [Changelog](https://github.com/securego/gosec/blob/master/.goreleaser.yml)
- [Commits](securego/gosec@6fbd381...0ce4453)

---
updated-dependencies:
- dependency-name: securego/gosec
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/scan.yml

@@ -77,7 +77,7 @@ jobs:
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v2
 
       - name: Run Gosec Security Scanner
-        uses: securego/gosec@6fbd381238e97e1d1f3358f0d6d65de78dcf9245 # master
+        uses: securego/gosec@0ce4453ddd8cca1291d2056cf903b545baad95a0 # master
         with:
           # we let the report trigger content trigger a failure using the GitHub Security features.
           args: '-no-fail -fmt sarif -out results.sarif ./...'