chore: rename for less confusion

lib/datasource/go.js

@@ -34,10 +34,10 @@ async function getSourcePurl(name) {
       new RegExp(`<meta name="go-source" content="${name}\\s+([^\\s]+)`)
     );
     if (sourceMatch) {
-      const [, sourceUrl] = sourceMatch;
-      logger.debug({ depName: name, sourceUrl }, 'Go lookup sourceUrl');
-      if (sourceUrl && sourceUrl.startsWith('https://github.com/')) {
-        return getGithubPurl(sourceUrl.replace('https://github.com/', ''));
+      const [, goSourceUrl] = sourceMatch;
+      logger.debug({ depName: name, goSourceUrl }, 'Go lookup source url');
+      if (goSourceUrl && goSourceUrl.startsWith('https://github.com/')) {
+        return getGithubPurl(goSourceUrl.replace('https://github.com/', ''));
       }
     } else {
       logger.trace({ depName: name }, 'No go-source header found');