Skip CI when modifying only README or CHANGELOG

.github/workflows/build.yml

@@ -1,6 +1,7 @@
 name: "Build"
 on:
   push:
+    paths-ignore: [ '*.md' ]
     branches:
       - master
 

.github/workflows/pull-request-verification.yml

@@ -1,6 +1,7 @@
 name: "Pull Request Verification"
 on:
   pull_request:
+    paths-ignore: [ '*.md' ]
     branches:
       - master
       - develop