Update NUnit.Analyzers to 4.8.0

---
updated-dependencies:
- dependency-name: NUnit.Analyzers
  dependency-version: 4.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

ImageSharpCompareTestNunit/ImageSharpCompareTestNunit.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
 		<TargetFrameworks>net8.0;net9.0</TargetFrameworks>
@@ -13,7 +13,7 @@
 		  <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 		</PackageReference>
 		<PackageReference Include="nunit" Version="4.3.2" />
-		<PackageReference Include="NUnit.Analyzers" Version="4.7.0">
+		<PackageReference Include="NUnit.Analyzers" Version="4.8.0">
 		  <PrivateAssets>all</PrivateAssets>
 		  <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 		</PackageReference>