Update README.md

README.md

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 # bazelisk-action
-Github Action for Bazelisk
+
+Installs bazelisk as a Github Action.
+
+## Usage
+
+```
+jobs:
+  runs-on: ubuntu-latest
+  steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+      
+    - name: Install Bazelisk
+      uses: vsco/[email protected]
+      with:
+        # [required]
+        # Version of Bazelisk we would like to install, defaults to 1.5.0
+        version: '1.5.0'
+        # [required]
+        # Install path for Bazelisk binaries, defaults to ./.local/bin
+        bazel-install-path: './.local/bin'
+```
+
+## License
+
+The Javascript Github Action and any documentation is released under the MIT License.
+Check LICENSE.md for more info.