- Only run the dynamic `auth_name` update code when its on the new or edit page. `.admin.authentication` also matches the main authentication screen which lead to a javascript error.
- Regression of forgejo/forgejo#7408
# Testing
1. Login as a admin.
2. Go to `/admin/auths`.
3. Notice no errors.
4. Go to `admin/auths/new`.
6. Select 'OAuth2' as authentication type.
5. Type some input into the 'Authentication name'.
6. Notice the the callback URL in the 'Tips' section including the authentication name.
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7470
Reviewed-by: Michael Kriese <michael.kriese@gmx.de>
Co-authored-by: Gusted <postmaster@gusted.xyz>
Co-committed-by: Gusted <postmaster@gusted.xyz>
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