fix: update anchor ID for documentation header

Author: sy-records

test/integration/__snapshots__/docs.test.js.snap

@@ -5,7 +5,7 @@ exports[`Docs Site coverpage renders and is unchanged 1`] = `
       <div class="mask"></div>
       <div class="cover-main"><!-- markdownlint-disable first-line-h1 -->
 
-<p><img src="http://127.0.0.1:4000/_media/icon.svg" data-origin="_media/icon.svg" alt="logo"></p><h1 id="docsify-500-rc1" tabindex="-1"><a href="#/?id=docsify-500-rc1" data-id="docsify-500-rc1" class="anchor"><span>docsify <small>5.0.0-rc.1</small></span></a></h1><blockquote>
+<p><img src="http://127.0.0.1:4000/_media/icon.svg" data-origin="_media/icon.svg" alt="logo"></p><h1 id="docsify" tabindex="-1"><a href="#/?id=docsify" data-id="docsify" class="anchor"><span>docsify <small>5.0.0-rc.1</small></span></a></h1><blockquote>
 <p>A magical documentation site generator</p></blockquote>
 <ul><li>Simple and lightweight</li><li>No statically built HTML files</li><li>Multiple themes</li></ul><p><a href="#/?id=docsify" class="button primary">Get Started</a>
 <a href="https://github.com/docsifyjs/docsify/" target="_blank" rel="noopener" class="button secondary">GitHub</a></p><!-- ![color](#f0f0f0) -->