Bump Polly from 8.6.5 to 8.6.6

---
updated-dependencies:
- dependency-name: Polly
  dependency-version: 8.6.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

build/Build.csproj

@@ -11,7 +11,7 @@
 
   <ItemGroup>
     <PackageReference Include="Nuke.Common" Version="10.1.0" />
-    <PackageReference Include="Polly" Version="8.6.5" />
+    <PackageReference Include="Polly" Version="8.6.6" />
   </ItemGroup>
 
   <ItemGroup>