Merge 8cd9b686db into 28b532bcb3

A confusion introduced by running `java HelloWorldApp.java`
I believe the file is not an artifact of `setup-java`, thus user should provide it. But there is no tips in the guide that user should prepare it in advance. Directly copy the code snippets will introduce a straightforward error, which should not happen in a guide.

.github/dependabot.yml

@@ -0,0 +1,22 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  # Enable version updates for npm
+  - package-ecosystem: 'npm'
+    # Look for `package.json` and `lock` files in the `root` directory
+    directory: '/'
+    # Check the npm registry for updates every day (weekdays)
+    schedule:
+      interval: 'weekly'
+
+  # Enable version updates for GitHub Actions
+  - package-ecosystem: 'github-actions'
+    # Workflow files stored in the default location of `.github/workflows`
+    # You don't need to specify `/.github/workflows` for `directory`. You can use `directory: "/"`.
+    directory: '/'
+    schedule:
+      interval: 'weekly'

README.md

@@ -74,7 +74,6 @@ steps:
   with:
     distribution: 'temurin' # See 'Supported distributions' for available options
     java-version: '21'
-- run: java HelloWorldApp.java
 ```
 
 #### Azul Zulu OpenJDK
@@ -85,7 +84,6 @@ steps:
   with:
     distribution: 'zulu' # See 'Supported distributions' for available options
     java-version: '21'
-- run: java HelloWorldApp.java
 ```
 
 #### Supported version syntax
@@ -209,7 +207,6 @@ steps:
     distribution: 'temurin'
     java-version: '21'
     check-latest: true
-- run: java HelloWorldApp.java
 ```
 
 ### Testing against different Java versions
@@ -228,7 +225,6 @@ jobs:
         with:
           distribution: '<distribution>'
           java-version: ${{ matrix.java }}
-      - run: java HelloWorldApp.java
 ```
 
 ### Install multiple JDKs