switch back to pull_request from pull_request_target

Author: ianbotsf

.github/workflows/artifact-size-metrics.yml

@@ -1,6 +1,6 @@
 name: Artifact Size Metrics
 on:
-  pull_request_target:
+  pull_request:
     types: [ opened, synchronize, reopened, labeled, unlabeled ]
     branches:
       - main

.github/workflows/changelog-verification.yml

@@ -4,7 +4,7 @@ permissions:
   id-token: write
 
 on:
-  pull_request_target:
+  pull_request:
     types: [ opened, synchronize, reopened, labeled, unlabeled ]
     branches:
       - main
@@ -22,4 +22,4 @@ jobs:
           aws-region: us-west-2
 
       - name: Verify changelog
-        uses: awslabs/aws-kotlin-repo-tools/.github/actions/changelog-verification@main
+        uses: awslabs/aws-kotlin-repo-tools/.github/actions/changelog-verification@main

.github/workflows/kat-transform.yml

@@ -1,7 +1,7 @@
 name: Kat Transform
 
 on:
-  pull_request_target:
+  pull_request:
     types: [ opened, synchronize, reopened, labeled, unlabeled ]
     branches:
       - main