ci: fix node engine check (#7891)

Author: mtrezza

ci/nodeEngineCheck.js

@@ -75,17 +75,21 @@ class NodeEngineCheck {
 
     // For each file
     for (const file of files) {
-
       // Get node version
       const contentString = await fs.readFile(file, 'utf-8');
-      const contentJson = JSON.parse(contentString);
-      const version = ((contentJson || {}).engines || {}).node;
-
-      // Add response
-      response.push({
-        file: file,
-        nodeVersion: version
-      });
+      try {
+        const contentJson = JSON.parse(contentString);
+        const version = ((contentJson || {}).engines || {}).node;
+
+        // Add response
+        response.push({
+          file: file,
+          nodeVersion: version
+        });
+      } catch(e) {
+        console.log(`Ignoring file because it is not valid JSON: ${file}`);
+        core.warning(`Ignoring file because it is not valid JSON: ${file}`);
+      }
     }
 
     // If results should be cleaned by removing undefined node versions