update

Author: pollenjp

README.md

@@ -1,3 +1,19 @@
 # setup-shfmt
 
-- Install shfmt and cache it for GitHub Actions
+- Install [shfmt](https://github.com/mvdan/sh) and cache it for GitHub Actions
+- Caching makes it especially efficient when using self-hosted runners
+
+## Usage
+
+```yaml
+jobs:
+  shfmt:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: pollenjp/setup-shfmt@v1
+        with:
+          version: latest
+      - uses: actions/checkout@v4
+      - name: Run shfmt
+        run: shfmt -d .
+```

action.yml

@@ -1,4 +1,4 @@
-name: 'setup-shfmt'
+name: 'setup-shfmt-action'
 description: 'Install shfmt and cache it for GitHub Actions'
 author: 'pollenJP'