ci: make validation caches read-only (#777)

.github/workflows/basic-validation.yml

@@ -14,6 +14,7 @@ on:
 jobs:
   call-basic-validation:
     name: Basic validation
+    cache-mode: read
     uses: actions/reusable-workflows/.github/workflows/basic-validation.yml@main
     with:
       node-version: '24'

.github/workflows/check-dist.yml

@@ -14,6 +14,7 @@ on:
 jobs:
   call-check-dist:
     name: Check dist/
+    cache-mode: read
     uses: actions/reusable-workflows/.github/workflows/check-dist.yml@main
     with:
       node-version: '24'

README.md

@@ -105,7 +105,7 @@ steps:
 
 ## Using the `dotnet-quality` input
 
-The `dotnet-quality` input installs the latest build of the specified quality in the channel. Supported values: `daily`, `preview`, `ga`.
+The `dotnet-quality` input installs the latest build of the specified quality in the channel. Supported values: `daily`, `preview`, `ga`. For more details about quality options, see the [official .NET documentation](https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-install-script#options).
 
 > **Note**: When used with a specific SDK version, `dotnet-quality` supports only `A.B`, `A.B.x`, `A`, `A.x`, and `A.B.Cxx` formats where the major version is higher than 5. For all other formats, `dotnet-quality` will be ignored.