chore: update documentation link

Co-authored-by: Martin Makarský <martinmakarsky@gmail.com>

metadata.yaml

@@ -1,5 +1,5 @@
 homepage: "https://fingerprintjs.com"
-documentation: "https://dev.fingerprintjs.com/docs/fingerprintjs-pro-gtm"
+documentation: "https://dev.fingerprintjs.com/docs/fingerprintjs-pro-google-tag-manager"
 versions:
   - sha: 90a3a0caa63f14432e2b6c7ad43e06c222c5d3f6
     changeNotes: Initial release.