Update README.md (#475)

* Update README.md

* Update README.md

README.md

@@ -11,7 +11,7 @@ This action provides the following functionality for GitHub Actions users:
 - Registering problem matchers for error output
 - Configuring authentication for GPR or npm
 
-# Usage
+## Usage
 
 See [action.yml](action.yml)
 
@@ -22,7 +22,7 @@ steps:
 - uses: actions/checkout@v3
 - uses: actions/setup-node@v3
   with:
-    node-version: '14'
+    node-version: 14
 - run: npm install
 - run: npm test
 ```
@@ -33,7 +33,7 @@ The action will first check the local cache for a semver match. If unable to fin
 
 For information regarding locally cached versions of Node.js on GitHub hosted runners, check out [GitHub Actions Virtual Environments](https://github.com/actions/virtual-environments).
 
-#### Supported version syntax
+### Supported version syntax
 
 The `node-version` input supports the following syntax:
 
@@ -58,7 +58,7 @@ steps:
 - uses: actions/checkout@v3
 - uses: actions/setup-node@v3
   with:
-    node-version: '14'
+    node-version: 14
     cache: 'npm'
 - run: npm install
 - run: npm test
@@ -71,14 +71,14 @@ steps:
 - uses: actions/checkout@v3
 - uses: actions/setup-node@v3
   with:
-    node-version: '14'
+    node-version: 14
     cache: 'npm'
     cache-dependency-path: subdir/package-lock.json
 - run: npm install
 - run: npm test
 ```
 
-## Matrix Testing:
+## Matrix Testing
 
 ```yaml
 jobs:
@@ -86,7 +86,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [ '12', '14', '16' ]
+        node: [ 12, 14, 16 ]
     name: Node ${{ matrix.node }} sample
     steps:
       - uses: actions/checkout@v3
@@ -109,11 +109,11 @@ jobs:
 7. [Publishing to npmjs and GPR with yarn](docs/advanced-usage.md#publish-to-npmjs-and-gpr-with-yarn)
 8. [Using private packages](docs/advanced-usage.md#use-private-packages)
 
-# License
+## License
 
 The scripts and documentation in this project are released under the [MIT License](LICENSE)
 
-# Contributions
+## Contributions
 
 Contributions are welcome! See [Contributor's Guide](docs/contributors.md)