fix: readme

Author: zhilyaev

README.md

@@ -2,10 +2,12 @@
 
 Install a specific version of helmwave binary on the runner.
 
+Documentation: https://docs.helmwave.app
+
 ```yaml
-- uses: helmwave/setup-action@v0.2.0
+- uses: helmwave/setup-action@v0.3.0
   with:
-    version: '0.17.1'
+    version: '0.28.0'
   id: install
 ```
 
@@ -25,7 +27,7 @@ jobs:
       - uses: helmwave/setup-action@v0.2.0
         name: Install helmwave
         with:
-          version: '0.17.1'
+          version: '0.28.0'
       - run: helmwave --version
       - run: helmwave yml
       - run: helmwave up --build