add workflow permissions (#150)

Author: robandpdx

.github/workflows/pr.yml

@@ -7,6 +7,10 @@ on:
       - opened
       - synchronize
 
+permissions:
+  contents: read
+  pull-requests: write
+
 jobs:
   run-tests:
     runs-on: ubuntu-latest

.github/workflows/review-probot-prs.yml

@@ -1,7 +1,13 @@
 name: Review Probot PRs
+
 on:
   pull_request:
     types: [opened, reopened]
+
+permissions:
+  contents: read
+  pull-requests: write
+
 jobs:
   bot:
     runs-on: ubuntu-latest

.github/workflows/test.yml

@@ -1,8 +1,13 @@
 name: Main Tests
+
 on:
   push:
     branches:
       - main
+
+permissions:
+  contents: read
+
 jobs:
   test:
     runs-on: ubuntu-latest