Switch to using linkspector for validating markdown links (#4643)

* Switch to using linkspector for validating markdown links

Author: MichaelSimons

.github/linters/.check-markdown-links.json

@@ -0,0 +1,14 @@
+aliveStatusCodes:
+  - 200
+  - 406
+dirs:
+  - .
+  - .github
+excludedDirs:
+  - eng/readme-templates
+ignorePatterns:
+  - pattern: "^https://github.com/dotnet/sdk/tree/main/src/SourceBuild/patches"
+  - pattern: "^https://dotnetcli.blob.core.windows.net/source-built-artifacts/sdks/"
+  - pattern: "^https://dotnetcli.blob.core.windows.net/source-built-artifacts/assets/"
+  - pattern: "^https://www.reddit.com/r/archlinux/comments/cx64r5/the_state_of_net_core_on_arch/"
+useGitIgnore: true

.github/linters/.linkspector.yml

@@ -2,4 +2,5 @@ default: true
 MD013: # line length
   code_block_line_length: 256
   heading_line_length: 96
+  line_length: 96
 MD033: false # no inline HTML

.github/linters/.markdown-lint.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

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

@@ -41,9 +41,8 @@ what can happen is
 1. In version 2, Package A is split into Package A1 and Package A2.
 1. A downstream repo is never updated to take the split packages.
 1. The version 2 source-build succeeds because Package A exists in the
-  [previously-source-built
-  archive](build-info.md#Single-version_and_single-RID_build), but no new
-  version of Package A is produced.
+  [previously-source-built archive](build-info.md#single-version-and-single-rid-build),
+  but no new version of Package A is produced.
 1. Source-build version 3 fails because Package A no longer exists in the
   previously-source-built archive either.