Fix label for pointing to a name instead of id in webhook setti…

…ngs (go-gitea#29209)

Here's the spec for the `for` attribute:
https://html.spec.whatwg.org/multipage/forms.html#attr-label-for

Signed-off-by: Yarden Shoham <git@yardenshoham.com>
(cherry picked from commit 0157db8)

templates/repo/settings/webhook/settings.tmpl

@@ -254,7 +254,7 @@
 <!-- Branch filter -->
 <div class="field">
  <label for="branch_filter">{{ctx.Locale.Tr "repo.settings.branch_filter"}}</label>
- <input name="branch_filter" type="text" value="{{or .Webhook.BranchFilter "*"}}">
+ <input id="branch_filter" name="branch_filter" type="text" value="{{or .Webhook.BranchFilter "*"}}">
  <span class="help">{{ctx.Locale.Tr "repo.settings.branch_filter_desc" | Str2html}}</span>
 </div>