test(#159): remove invalid escape from reachability fixture

Author: marcohost33-maker

.github/scripts/test_agent_branch_triggers.py

@@ -73,7 +73,7 @@ def test_required_merge_job_cannot_be_replaced_by_skipped_job(self) -> None:
         path = self.fixture(
             "jobs:\n"
             "  test:\n"
-            "    if: \${{ github.event_name == 'push' }}\n"
+            "    if: ${{ github.event_name == 'push' }}\n"
             "    steps:\n"
             "      - uses: actions/checkout@deadbeef\n"
             "        with:\n          persist-credentials: false\n"