fix: incorrect branch name for issue_comment event (#1625)

Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

src/utils.ts

@@ -696,6 +696,28 @@ export const getRemoteBranchHeadSha = async ({
   return stdout.trim()
 }
 
+export const getCurrentBranchName = async ({
+  cwd
+}: {
+  cwd: string
+}): Promise<string> => {
+  const {stdout, exitCode} = await exec.getExecOutput(
+    'git',
+    ['rev-parse', '--abbrev-ref', 'HEAD'],
+    {
+      cwd,
+      ignoreReturnCode: true,
+      silent: !core.isDebug()
+    }
+  )
+
+  if (exitCode !== 0) {
+    return ''
+  }
+
+  return stdout.trim()
+}
+
 export const getParentSha = async ({cwd}: {cwd: string}): Promise<string> => {
   const {stdout, exitCode} = await exec.getExecOutput(
     'git',