The authentication provider's name (`$provider.DisplayName`) is not URL-encoded, so any illegal characters (e.g., '/') will be put in the link's href attribute verbatim.
For example, if the provider's name is `foo/bar` (valid name), the href attribute will point to `/user/oauth2/foo/bar` instead of `/user/oauth2/foo%2Fbar`, resulting in a "404 Not found" error.
This patch fixes this behaviour by URL-encoding the provider's DisplayName before appending it to the href attribute.
Signed-off-by: doasu <me@doasu.dev>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/10301
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: doasu <me@doasu.dev>
Co-committed-by: doasu <me@doasu.dev>
