trigger on label (#11)

### Description
The Dependency Review action fails to trigger sometimes. As a
workaround, we're making it trigger on label/unlabel. See
https://hex-tech-hq.slack.com/archives/C05AYKDRT6H/p1744922860512639

### Testing

Author: akhanhextech

.github/workflows/dependency-review.yml

@@ -1,5 +1,11 @@
 name: 'Dependency Review'
-on: [pull_request]
+on:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - labeled
+      - unlabeled
 
 permissions:
   contents: read