markdown lint check workflow

Author: krishpranav

.github/workflows/check.yml

@@ -0,0 +1,13 @@
+name: check
+
+on: [push, pull_request]
+
+jobs:
+
+  markdown-check:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@master
+      - uses: gaurav-nelson/github-action-markdown-link-check@v1