fix: do not double wrap GitHub user links in changelog (#1428)

The new `git-cliff`-based workflow in Apify SDK Python already generates
the changelog with actual Markdown links for users. Together with the
logic from the theme, this caused the userlinks to be "doubled".

Author: barjin

apify-docs-theme/src/markdown.js

@@ -11,6 +11,7 @@ const { visitParents } = require('unist-util-visit-parents');
 function updateChangelog(changelog) {
     const pipeline = unified()
         .use(remarkParse)
+        .use(removeGitCliffMarkers)
         .use(incrementHeadingLevels)
         .use(prettifyPRLinks)
         .use(linkifyUserTags)
@@ -31,10 +32,21 @@ function updateChangelog(changelog) {
  */
 const incrementHeadingLevels = () => (tree) => {
     visitParents(tree, 'heading', (node) => {
+        if (node.depth === 1 && node.children[0].value === 'Changelog') return;
+
         node.depth += 1;
     });
 };
 
+const removeGitCliffMarkers = () => (tree) => {
+    visitParents(tree, 'html', (node) => {
+        const gitCliffMarkerRegex = /generated by git-cliff/ig;
+        const match = gitCliffMarkerRegex.exec(node.value);
+
+        if (match) node.value = '';
+    });
+};
+
 /**
  * Links user tags in the markdown content. This function replaces the user tags
  * (e.g. `@username`) with a link to the user's GitHub profile (just like GitHub's UI).
@@ -46,9 +58,10 @@ const linkifyUserTags = () => (tree) => {
         const userTagRegex = /@([a-zA-Z0-9-]+)(\s|$)/g;
         const match = userTagRegex.exec(node.value);
 
-        if (!match) return;
-
         const directParent = parents[parents.length - 1];
+
+        if (!match || directParent.type === 'link') return;
+
         const nodeIndexInParent = directParent.children.findIndex((x) => x === node);
 
         const username = match[1];