chore(deps): update dependency polly to 8.6.6

Author: renovate[bot]

build/_build.csproj

@@ -17,6 +17,6 @@
 
     <ItemGroup>
         <PackageReference Include="Nuke.Common" Version="10.1.0" />
-        <PackageReference Include="Polly" Version="8.6.5" />
+        <PackageReference Include="Polly" Version="8.6.6" />
     </ItemGroup>
 </Project>