fix: use correct httpClient method name in GraphQL batch fetch

The httpClient exports requestJson as 'getJson', not 'requestJson'.
This bug caused the GitHub stars collection to fail silently in
the pipeline, as the method call threw an error.

This fixes the issue where GitHub stars were not being collected
during the container build in GitHub Actions.

Author: KristjanESPERANTO

scripts/collect-metadata/index.js

@@ -103,7 +103,7 @@ async function fetchGitHubBatch (modules) {
   const query = `query { ${repoFragments.join("\n")} }`;
 
   try {
-    const response = await httpClient.requestJson("https://api.github.com/graphql", {
+    const response = await httpClient.getJson("https://api.github.com/graphql", {
       method: "POST",
       headers: {
         Authorization: `Bearer ${process.env.GITHUB_TOKEN}`,