Exclude Dependabot updates workflow from required PR checks

This runs on `main` and is not relevant to PRs.

.github/workflows/script/update-required-checks.sh

@@ -23,7 +23,7 @@ fi
 echo "Getting checks for $GITHUB_SHA"
 
 # Ignore any checks with "https://", CodeQL, LGTM, and Update checks.
-CHECKS="$(gh api repos/github/codeql-action/commits/"${GITHUB_SHA}"/check-runs --paginate | jq --slurp --compact-output --raw-output '[.[].check_runs | .[].name | select(contains("https://") or . == "CodeQL" or . == "LGTM.com" or . == "check-expected-release-files" or contains("Update") or contains("update") or contains("test-setup-python-scripts") | not)] | unique | sort')"
+CHECKS="$(gh api repos/github/codeql-action/commits/"${GITHUB_SHA}"/check-runs --paginate | jq --slurp --compact-output --raw-output '[.[].check_runs | .[].name | select(contains("https://") or . == "CodeQL" or . == "Dependabot" or . == "LGTM.com" or . == "check-expected-release-files" or contains("Update") or contains("update") or contains("test-setup-python-scripts") | not)] | unique | sort')"
 
 echo "$CHECKS" | jq