ci: bring back shouldUpdate check

.github/actions/update-badge/index.js

@@ -20,8 +20,12 @@ let octokit
     await core.group('Fetching repositories & updating lines...', async () => {
       for (const repo of repos) {
         const line = await generateLine(repo.repoStr)
-        core.info(`...repo line: '${line}'`)
-        lines[repo.index] = line
+        if (shouldUpdate(lines[repo.index], line)) {
+          lines[repo.index] = line
+          core.info(`...updated line: '${line}'`)
+        } else {
+          core.info(`...skipped line: '${line}'`)
+        }
       }
     })
 
@@ -75,3 +79,8 @@ async function generateBadge(repoStr) {
     .map(s => encodeURIComponent(s.replace(/\-/g, '--')))
     .join('-')
 }
+
+function shouldUpdate(oldLine, newLine) {
+  const badDateReg = /red\)$/
+  return badDateReg.test(oldLine) || !badDateReg.test(newLine)
+}