chore: restrict who can make releases (#19326)

This PR confines who can run the `Release` action to members with
`maintain` or above

.github/workflows/release.yaml

@@ -32,9 +32,36 @@ env:
   CODER_RELEASE_NOTES: ${{ inputs.release_notes }}
 
 jobs:
+  # Only allow maintainers/admins to release.
+  check-perms:
+    runs-on: ${{ github.repository_owner == 'coder' && 'depot-ubuntu-22.04-8' || 'ubuntu-latest' }}
+    steps:
+      - name: Allow only maintainers/admins
+        uses: actions/github-script@v7.0.1
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const {data} = await github.rest.repos.getCollaboratorPermissionLevel({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              username: context.actor
+            });
+            const role = data.role_name || data.user?.role_name || data.permission;
+            const perms = data.user?.permissions || {};
+            core.info(`Actor ${context.actor} permission=${data.permission}, role_name=${role}`);
+
+            const allowed =
+              role === 'admin' ||
+              role === 'maintain' ||
+              perms.admin === true ||
+              perms.maintain === true;
+
+            if (!allowed) core.setFailed('Denied: requires maintain or admin');
+
   # build-dylib is a separate job to build the dylib on macOS.
   build-dylib:
     runs-on: ${{ github.repository_owner == 'coder' && 'depot-macos-latest' || 'macos-latest' }}
+    needs: check-perms
     steps:
       # Harden Runner doesn't work on macOS.
       - name: Checkout
@@ -114,7 +141,7 @@ jobs:
 
   release:
     name: Build and publish
-    needs: build-dylib
+    needs: [build-dylib, check-perms]
     runs-on: ${{ github.repository_owner == 'coder' && 'depot-ubuntu-22.04-8' || 'ubuntu-latest' }}
     permissions:
       # Required to publish a release