ci: skip workflow on docs-only changes (#30)

Author: zfarrell

.github/workflows/ci.yml

@@ -3,8 +3,18 @@ name: CI
 on:
   push:
     branches: [main]
+    paths-ignore:
+      - "**.md"
+      - "LICENSE"
+      - ".gitignore"
+      - "docs/**"
   pull_request:
     branches: [main]
+    paths-ignore:
+      - "**.md"
+      - "LICENSE"
+      - ".gitignore"
+      - "docs/**"
 
 env:
   CARGO_TERM_COLOR: always