Fix broken links

Author: MichaelSimons

.github/linters/.linkspector.yml

@@ -7,7 +7,6 @@ dirs:
 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/"

Documentation/patching-guidelines.md

@@ -24,10 +24,10 @@ git format-patch --zero-commit --no-signature -1
 Then, move the patch file into the `src/SourceBuild/patches/<repo>` directory of
 the following repo:
 
-* [.NET 9.0+]
-  [sdk](https://github.com/dotnet/sdk/tree/main/src/SourceBuild/patches)
+* [.NET 9.0]
+  [sdk](https://github.com/dotnet/sdk/tree/release/9.0.1xx)
 * [.NET 8.0]
-  [installer](https://github.com/dotnet/installer/tree/main/src/SourceBuild/patches)
+  [installer](https://github.com/dotnet/installer/tree/release/8.0.1xx)
 
 If an existing directory for the repo does not already exist, you will need to
 create one.