Reduce unneeded Check executions (#271)

Author: spier

.github/workflows/lint-patterns.yml

@@ -6,6 +6,12 @@ on:
     branches:
       - "master"
   pull_request:
+    paths:
+      - ".github/workflows/lint-patterns.yml"
+      - "lint/*"
+      - "patterns/2-structured/*.md"
+      - "patterns/2-structured/project-setup/*.md"
+      - "patterns/3-validated/*.md"
 
 jobs:
   validate: