Run GitHub actions on pull requests only when necessary

Author: Takishima

.github/workflows/ci.yml

@@ -2,6 +2,7 @@ name: CI
 
 on:
   pull_request:
+    types: [assigned, opened, synchronize, reopened]
   push:
     branches:
       - main

.github/workflows/codeql-analysis.yml

@@ -17,6 +17,7 @@ on:
   pull_request:
     # The branches below must be a subset of the branches above
     branches: [ main ]
+    types: [assigned, opened, synchronize, reopened]
   schedule:
     - cron: '24 9 * * 0'
 

.github/workflows/format.yml

@@ -2,6 +2,7 @@ name: Format
 
 on:
   pull_request:
+    types: [assigned, opened, synchronize, reopened]
   push:
     branches:
     - main

CHANGELOG.md

@@ -15,6 +15,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 -   Fix issue when processing keyword arguments for `os.open()`
 
+### Repository
+
+-   Restrict running some GitHub actions only when pull requests are updated
+
 ## [1.3.0] - 2021-07-26
 
 ### Added