Bump actions/attest-build-provenance from 1.4.4 to 2.1.0 in the githu…

…b-actions group across 1 directory (#470)

Bumps the github-actions group with 1 update: [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance).
Updates `actions/attest-build-provenance` from 2.0.1 to 2.1.0
- [Release notes](https://github.com/actions/attest-build-provenance/releases)
- [Changelog](https://github.com/actions/attest-build-provenance/blob/main/RELEASE.md)
- [Commits](actions/attest-build-provenance@c4fbc64...7668571)

.github/workflows/release-main.yml

@@ -32,7 +32,7 @@ jobs:
       run: ./build.sh generateapichanges -s true
 
     - name: generate build provenance
-      uses: actions/attest-build-provenance@ef244123eb79f2f7a7e75d99086184180e6d0018  # v1.4.4
+      uses: actions/attest-build-provenance@7668571508540a607bdfd90a87a560489fe372eb  # v2.1.0
       with:
         subject-path: "${{ github.workspace }}/build/output/*.nupkg"
 

.github/workflows/release.yml

@@ -37,7 +37,7 @@ jobs:
       run: ./build.sh createreleaseongithub -s true --token ${{ secrets.GITHUB_TOKEN }}
 
     - name: generate build provenance
-      uses: actions/attest-build-provenance@ef244123eb79f2f7a7e75d99086184180e6d0018  # v1.4.4
+      uses: actions/attest-build-provenance@7668571508540a607bdfd90a87a560489fe372eb  # v2.1.0
       with:
         subject-path: "${{ github.workspace }}/build/output/*.nupkg"