Gitea 1.18.0: upgrade templates

- use Chapril logo in head navbar
- s/.i18.Tr/.locale.Tr/

templates/base/head_navbar.tmpl

@@ -5,7 +5,7 @@
 	{{end}}
 	<div class="item brand" style="justify-content: space-between;">
 		<a href="{{AppSubUrl}}/" aria-label="{{if .IsSigned}}{{.locale.Tr "dashboard"}}{{else}}{{.locale.Tr "home"}}{{end}}">
-			<img width="30" height="30" src="{{AssetUrlPrefix}}/img/logo.svg" alt="{{.locale.Tr "logo"}}" aria-hidden="true">
+			<img width="30" height="30" src="{{AssetUrlPrefix}}/img/gitea-sm.png" alt="{{.locale.Tr "logo"}}" aria-hidden="true">
 		</a>
 		{{if .IsSigned}}
 		<a href="{{AppSubUrl}}/notifications" class="tooltip mobile-only" data-content='{{.locale.Tr "notifications"}}'>

templates/custom/extra_links.tmpl

@@ -1,4 +1,4 @@
 {{if .IsSigned}}
-<a class="item" href="https://docs.gitea.io/">{{.i18n.Tr "help"}}</a>
+<a class="item" href="https://docs.gitea.io/">{{.locale.Tr "help"}}</a>
 {{end}}
 <a class="item" href="mailto:forge-support@chapril.org">Support</a>

templates/custom/extra_links_footer.tmpl

@@ -1 +1 @@
-<a target="_blank" rel="noopener noreferrer" href="https://docs.gitea.io/">{{.i18n.Tr "help"}}</a>
+<a target="_blank" rel="noopener noreferrer" href="https://docs.gitea.io/">{{.locale.Tr "help"}}</a>