Bump up markdown-link-check. Ignore 127.0.0.1 (#398)

.dlc.json

@@ -3,6 +3,9 @@
     {
       "pattern": "^http://localhost"
     },
+    {
+      "pattern": "^http://127.0.0.1"
+    },
     {
       "pattern": "^https://github.com/apache/skywalking-java/blob/master/changes/changes-x.y.z.md$"
     },

.github/workflows/dead-link-checker.yaml

@@ -29,7 +29,7 @@ jobs:
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@v2
-      - run: sudo npm install -g markdown-link-check@3.10.0
+      - run: sudo npm install -g markdown-link-check@3.10.3
       - run: |
           for file in $(find . -name "*.md"); do
             markdown-link-check -c .dlc.json -q "$file"