feat: add missing permissions

Author: user-cube

.github/workflows/pr-size-check-external.yml

@@ -7,6 +7,11 @@ on:
   pull_request:
     types: [opened, synchronize, reopened]
 
+permissions:
+  contents: write
+  issues: write
+  pull-requests: write
+  
 jobs:
   check-pr-size:
     runs-on: ubuntu-latest

.github/workflows/pr-size-check.yml

@@ -4,6 +4,11 @@ on:
   pull_request:
     types: [opened, synchronize, reopened]
 
+permissions:
+  contents: write
+  issues: write
+  pull-requests: write
+
 jobs:
   check-pr-size:
     runs-on: ubuntu-latest