Update ci.yml (#83)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f92c0f7..d62181b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -103,4 +103,4 @@
     steps:
       - uses: actions/checkout@v2
       - name: Check License Header
-        uses: apache/skywalking-eyes@main
+        uses: apache/skywalking-eyes/header@501a28d2fb4a9b962661987e50cf0219631b32ff