"Edit on GitHub" should always go on main

This prevents all these PRs against the wrong versions. It might, however be confusing if the contents are very different.

This was decided 31.10.24 in the team meeting: https://notes.typo3.org/T3DocTeamMeeting

Author: linawolf

Documentation/guides.xml

@@ -8,7 +8,7 @@
                project-contact="https://typo3.slack.com/archives/C028JEPJL"
                project-repository="https://github.com/TYPO3-Documentation/TYPO3CMS-Guide-FrontendLocalization"
                project-issues="https://github.com/TYPO3-Documentation/TYPO3CMS-Guide-FrontendLocalization/issues"
-               edit-on-github-branch="13.4"
+               edit-on-github-branch="main"
                edit-on-github="TYPO3-Documentation/TYPO3CMS-Guide-FrontendLocalization"
                typo3-core-preferred="13"
                interlink-shortcode="t3translate"