chore: Bump Microsoft.Graph from 5.101.0 to 6.2.0

---
updated-dependencies:
- dependency-name: Microsoft.Graph
  dependency-version: 6.2.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

src/FluentEmail.Graph/FluentEmail.Graph.csproj

@@ -50,7 +50,7 @@ v2.1 Added support for Inline images
         <PackageReference Include="JetBrains.Annotations" Version="2025.2.4">
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
-        <PackageReference Include="Microsoft.Graph" Version="5.101.0" />
+        <PackageReference Include="Microsoft.Graph" Version="6.2.0" />
         <PackageReference Include="MinVer" Version="7.0.0">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>