docs: Use callout for warning

LukeSavefrogs · LukeSavefrogs · commit 88d8b2b111fa · 2024-05-14T10:50:15.000+02:00
diff --git a/README.md b/README.md
@@ -72,7 +72,7 @@ This action supports all versions (_both stable and development releases_) curre
 - [SourceForge - Development](https://sourceforge.net/projects/jython/files/jython-dev/) (`2.5a1` - `2.7.0a2`)
 - [Maven](https://search.maven.org/artifact/org.python/jython-installer) (`2.5.3-rc1` - `2.7.3`)
 
-> ⚠️ **WARNING** ⚠️
+> [!WARNING]
 >
 > As of **`v3`**, Jython versions **2.0**/**2.1** **work only on `windows-*` runners**!
 >

Original file line number	Diff line number	Diff line change
`@@ -72,7 +72,7 @@ This action supports all versions (_both stable and development releases_) curre`
`72`	`72`	- [SourceForge - Development](https://sourceforge.net/projects/jython/files/jython-dev/) (`2.5a1` - `2.7.0a2`)
`73`	`73`	- [Maven](https://search.maven.org/artifact/org.python/jython-installer) (`2.5.3-rc1` - `2.7.3`)
`74`	`74`
`75`		`-> ⚠️ WARNING ⚠️`
	`75`	`+> [!WARNING]`
`76`	`76`	`>`
`77`	`77`	> As of `v3`, Jython versions 2.0/2.1 *work only on `windows-` runners**!
`78`	`78`	`>`