Update apache/skywalking-eyes digest to 8b1d66c

Author: renovate[bot]

.github/workflows/license-check.yaml

@@ -6,4 +6,4 @@ jobs:
     steps:
     - uses: actions/checkout@master
     - name: Check License Header
-      uses: apache/skywalking-eyes/header@ed436a5593c63a25f394ea29da61b0ac3731a9fe
+      uses: apache/skywalking-eyes/header@8b1d66c9c598b77b33d9558c31d7922738851d1d