Bump anchore/sbom-action from 0.21.0 to 0.21.1 (#2898)

Author: dependabot[bot]

.github/workflows/build.yml

@@ -135,7 +135,7 @@ jobs:
         if-no-files-found: error
 
     - name: Generate SBOM
-      uses: anchore/sbom-action@a930d0ac434e3182448fe678398ba5713717112a # v0.21.0
+      uses: anchore/sbom-action@0b82b0b1a22399a1c542d4d656f70cd903571b5c # v0.21.1
       if: runner.os == 'Windows'
       with:
         artifact-name: polly.spdx.json