ci: fix checking of github.com links

run check:markdown reports back failure status if bad links are found

md-linkcheck.json

@@ -0,0 +1,16 @@
+{
+    "httpHeaders": [
+        {
+            "urls": [
+                "https://github.com/",
+                "https://guides.github.com/",
+                "https://docs.github.com/",
+                "https://help.github.com/",
+                "https://support.github.com"
+            ],
+            "headers": {
+                "Accept-Encoding": "zstd, br, gzip, deflate"
+            }
+        }
+    ]
+}

package.json

@@ -13,7 +13,7 @@
     "test": "echo \"There are no tests :(\"",
     "build": "ncc build -o dist index.js",
     "format": "prettier --write index.js",
-    "check:markdown": "find *.md -exec npx markdown-link-check {} \\;",
+    "check:markdown": "find *.md -print0 | xargs -0 -n1 markdown-link-check -c md-linkcheck.json",
     "install-v10-deps": "./scripts/npm-install-v10-examples.sh"
   },
   "repository": {