Bump coverlet.collector from 6.0.4 to 8.0.0

---
updated-dependencies:
- dependency-name: coverlet.collector
  dependency-version: 8.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

tests/FluentEmail.Graph.Tests/FluentEmail.Graph.Tests.csproj

@@ -11,7 +11,7 @@
 
   <ItemGroup>
     <PackageReference Include="AwesomeAssertions" Version="9.4.0" />
-    <PackageReference Include="coverlet.collector" Version="6.0.4">
+    <PackageReference Include="coverlet.collector" Version="8.0.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>