Switch to using linkspector for validating markdown links

.github/linters/.linkspector.yml

@@ -0,0 +1,12 @@
+aliveStatusCodes:
+  - 200
+  - 406
+dirs:
+  - .
+  - .github
+excludedDirs:
+  - eng/readme-templates
+ignorePatterns:
+  - pattern: "^https://dotnetbinaries.blob.core.windows.net/dockerassets"
+  - pattern: "^https://github.com/dotnet/release/blob/main/.github/ISSUE_TEMPLATE/dotnet-fx-docker-servicing-release.md"
+useGitIgnore: true

.github/workflows/check-markdown-links.yml

@@ -17,8 +17,8 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Check markdown links
-        uses: gaurav-nelson/github-action-markdown-link-check@v1
+        uses: umbrelladocs/action-linkspector@v1
         with:
-          config-file: .github/linters/.check-markdown-links.json
-          use-quiet-mode: 'yes'
-          use-verbose-mode: 'no'
+          config_file: .github/linters/.linkspector.yml
+          fail_on_error: true
+          filter_mode: nofilter