docs: append --no-daemon option for Windows user (#218)

KengoTODA · web-flow · commit 68c162b39ca5 · 2021-09-13T12:53:49.000+03:00
To cache deps successfully even on Windows, it's better to add `--no-daemon` option to the Gradle build, or the save process will fail due to 'permission denied' error. refs actions/cache#454
diff --git a/README.md b/README.md
@@ -75,7 +75,7 @@ steps:
     distribution: 'temurin'
     java-version: '11'
     cache: 'gradle'
-- run: ./gradlew build
+- run: ./gradlew build --no-daemon
 ```
 
 #### Caching maven dependencies
