fix: make plugin header detection more flexible

The version bumper now correctly identifies WordPress plugin headers by searching
for any comment block containing "Plugin Name:", rather than requiring a specific
header format. This makes the tool more robust and compatible with a wider range
of WordPress plugin header styles.

src/versionBumper.ts

@@ -62,8 +62,8 @@ type Version = {
  * @throws Error if version not found in plugin header
  */
 function findVersionPosition(content: string): { match: string; index: number } {
-  // Find the plugin header block (must start with Plugin Name after comment start)
-  const headerRegex = /\/\*\*\s*\n\s*\* Plugin Name:[\s\S]*?\*\//;
+  // Find any comment block containing Plugin Name
+  const headerRegex = /\/\*\*[\s\S]*?Plugin Name:[\s\S]*?\*\//;
   const headerMatch = content.match(headerRegex);
 
   if (!headerMatch) {