Bump Microsoft.ServiceFabric.Actors from 8.0.2707 to 8.1.208 (#256)

---
updated-dependencies:
- dependency-name: Microsoft.ServiceFabric.Actors
  dependency-version: 8.1.208
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Directory.Packages.props

@@ -7,7 +7,7 @@
 
   <!-- ServiceFabric.Mocks.csproj -->
   <ItemGroup>
-    <PackageVersion Include="Microsoft.ServiceFabric.Actors" Version="8.0.2707" />
+    <PackageVersion Include="Microsoft.ServiceFabric.Actors" Version="8.1.208" />
   </ItemGroup>
 
   <!-- ServiceFabric.Mocks.NetCoreTests.csproj -->