ACS-6650 Avoid running SAST scan on DependaBot PRs

Skipping SAST scan on DependaBot PRs as it won't provide any additional insights and requires sharing more secrets with DependaBot than we're willing to.

.github/workflows/ci.yml

@@ -57,6 +57,7 @@ jobs:
     runs-on: ubuntu-latest
     if: >
       (github.ref_name == 'master' || startsWith(github.ref_name, 'SP/') || startsWith(github.ref_name, 'HF/') || github.event_name == 'pull_request') &&
+      github.actor != 'dependabot[bot]' &&
       !contains(github.event.head_commit.message, '[skip tests]')
     steps:
       - uses: actions/checkout@v3