Use new aliases for template functions

`page.rs.html` used to result in a function `templates::page`.
Since ructe 0.7.2, `templates::page_html` was used and now the old alias
has been removed.

templates/overview.rs.html

@@ -1,10 +1,10 @@
-@use super::base;
+@use super::base_html;
 @use crate::statics::VersionInfo;
 @use crate::template::RepoInfo;
 
 @(version_info: VersionInfo, repo_count: usize, repo_info: RepoInfo, label: String)
 
-@:base("Hits-of-Code Badges", "Overview", {
+@:base_html("Hits-of-Code Badges", "Overview", {
 
 <p>
 The project <a href="@repo_info.url">@repo_info.url</a> has