ci: add .github/workflows to CI build.yml (#211)

Author: sullis

.github/workflows/build.yml

@@ -12,6 +12,7 @@ on:
       - 'powertools-validation/**'
       - 'powertools-parameters/**'
       - 'pom.xml'
+      - '.github/workflows/**'
   push:
     branches:
       - master