adding permissions to workflow (#2984)

.github/workflows/example_notifier.yml

@@ -2,6 +2,8 @@ name: Warning maintainers
 on:
   pull_request_target:
     paths: examples/**
+permissions:
+ pull-requests: write
 jobs:
   job:
     runs-on: ubuntu-latest

.github/workflows/pre-commit_dependencies_notifier.yml

@@ -5,6 +5,8 @@ on:
       - requirements.txt
       - requirements-dev.txt
       - .pre-commit-config.yaml
+permissions:
+ pull-requests: write
 jobs:
   job:
     runs-on: ubuntu-latest

.github/workflows/readme_notifier.yml

@@ -4,6 +4,8 @@ on:
     paths:
       - README.rst
       - README_RAW.rst
+permissions:
+ pull-requests: write
 jobs:
   job:
     runs-on: ubuntu-latest