ci: bump actions/attest-build-provenance from 1 to 2 (#12271)

Bumps [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance) from 1 to 2.
- [Release notes](https://github.com/actions/attest-build-provenance/releases)
- [Changelog](https://github.com/actions/attest-build-provenance/blob/main/RELEASE.md)
- [Commits](https://github.com/actions/attest-build-provenance/compare/v1...v2)

---
updated-dependencies:
- dependency-name: actions/attest-build-provenance
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/ci-main.yml

@@ -275,7 +275,7 @@ jobs:
           cache-from: type=registry,ref=ghcr.io/goauthentik/dev-server:buildcache
           cache-to: ${{ steps.ev.outputs.shouldPush == 'true' && 'type=registry,ref=ghcr.io/goauthentik/dev-server:buildcache,mode=max' || '' }}
           platforms: linux/${{ matrix.arch }}
-      - uses: actions/attest-build-provenance@v1
+      - uses: actions/attest-build-provenance@v2
         id: attest
         if: ${{ steps.ev.outputs.shouldPush == 'true' }}
         with:

.github/workflows/ci-outpost.yml

@@ -111,7 +111,7 @@ jobs:
           context: .
           cache-from: type=registry,ref=ghcr.io/goauthentik/dev-${{ matrix.type }}:buildcache
           cache-to: ${{ steps.ev.outputs.shouldPush == 'true' && format('type=registry,ref=ghcr.io/goauthentik/dev-{0}:buildcache,mode=max', matrix.type) || '' }}
-      - uses: actions/attest-build-provenance@v1
+      - uses: actions/attest-build-provenance@v2
         id: attest
         if: ${{ steps.ev.outputs.shouldPush == 'true' }}
         with:

.github/workflows/release-publish.yml

@@ -55,7 +55,7 @@ jobs:
             VERSION=${{ github.ref }}
           tags: ${{ steps.ev.outputs.imageTags }}
           platforms: linux/amd64,linux/arm64
-      - uses: actions/attest-build-provenance@v1
+      - uses: actions/attest-build-provenance@v2
         id: attest
         with:
           subject-name: ${{ steps.ev.outputs.attestImageNames }}
@@ -119,7 +119,7 @@ jobs:
           file: ${{ matrix.type }}.Dockerfile
           platforms: linux/amd64,linux/arm64
           context: .
-      - uses: actions/attest-build-provenance@v1
+      - uses: actions/attest-build-provenance@v2
         id: attest
         with:
           subject-name: ${{ steps.ev.outputs.attestImageNames }}