ci: Add paths-ignore to GitHub workflow

.github/workflows/build-and-test.yml

@@ -4,6 +4,9 @@ on:
   pull_request:
     branches:
       - master
+    paths-ignore:
+      - './**/*.md'
+      - 'LICENSE'
 
 env:
   IMAGE_NAME: localhost:5000/cdalvaro/docker-salt-master:${{ github.sha }}

.github/workflows/publish.yml

@@ -4,6 +4,9 @@ on:
   push:
     branches:
       - master
+    paths-ignore:
+      - './**/*.md'
+      - 'LICENSE'
   release:
     types:
       - created