Improve error communicate in amemendment checker

tools/check-rec-amendment.js

@@ -12,16 +12,20 @@ module.exports = async ({github, context, core}) => {
   const prAmendmentSection = Object.values(amendments).find(list => list.find(a => Array.isArray(a.pr) ? a.pr.includes(context.issue.number) : a.pr === context.issue.number ));
   if (!prAmendmentSection) {
     core.setFailed(`Pull request ${context.issue.number} not labeled as editorial and not referenced in amendments.json`);
+    process.exit(2);
   }
   const prAmendment = prAmendmentSection.find(a => Array.isArray(a.pr) ? a.pr.includes(context.issue.number) : a.pr === context.issue.number );
   if (!prAmendment.testUpdates || !prAmendment.testUpdates.length === 0) {
     core.setFailed(`Pull request ${context.issue.number} declares an amendment but does not document its test status in testUpdates`);
+    process.exit(2);
   }
   const validTestUpdates = ["already-tested", "not-testable"];
   if (typeof prAmendment.testUpdates === "string" && !validTestUpdates.includes(prAmendment.testUpdates)) {
     core.setFailed(`Pull request ${context.issue.number} declares an invalid test status in its amendment testUpdates field`);
+    process.exit(2);
   }
   if (Array.isArray(prAmendment.testUpdates) && !prAmendment.testUpdates.every(t => t.match(/^web-platform-tests\/wpt#[0-9]+$/))) {
     core.setFailed(`Pull request ${context.issue.number} declares test updates but not using the expected format to point to web-platform-tests PRs: "web-platform-tests/wpt#NNN"`);
+    process.exit(2);
   }
 };