Fix README.md (#898)

* Fix URL of locally-cached Node.js version in README

* Change example of Major versions in Supported version syntax

setup-node v4 supports node v20, but these example may
cause misunderstanding like a v20 is not supported.

---------

Co-authored-by: fusagiko/takayamaki <takayamaki@users.noreply.github.com>

README.md

@@ -103,12 +103,12 @@ The `node-version` input supports the Semantic Versioning Specification, for mor
 
 Examples:
 
- - Major versions: `14`, `16`, `18`
+ - Major versions: `16`, `18`, `20`
  - More specific versions: `10.15`, `16.15.1` , `18.4.0`
  - NVM LTS syntax: `lts/erbium`, `lts/fermium`, `lts/*`, `lts/-n`
  - Latest release: `*` or `latest`/`current`/`node`
 
-**Note:** Like the other values, `*` will get the latest [locally-cached Node.js version](https://github.com/actions/runner-images/blob/main/images/linux/Ubuntu2204-Readme.md#nodejs), or the latest version from [actions/node-versions](https://github.com/actions/node-versions/blob/main/versions-manifest.json), depending on the [`check-latest`](docs/advanced-usage.md#check-latest-version) input.
+**Note:** Like the other values, `*` will get the latest [locally-cached Node.js version](https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2204-Readme.md#nodejs), or the latest version from [actions/node-versions](https://github.com/actions/node-versions/blob/main/versions-manifest.json), depending on the [`check-latest`](docs/advanced-usage.md#check-latest-version) input.
 
 `current`/`latest`/`node` always resolve to the latest [dist version](https://nodejs.org/dist/index.json).
 That version is then downloaded from actions/node-versions if possible, or directly from Node.js if not.