Update dependency Polly.Core to 8.6.4

Author: dependencyupdates[bot]

src/Directory.Packages.props

@@ -60,7 +60,7 @@
     <PackageVersion Include="Particular.Approvals" Version="2.0.1" />
     <PackageVersion Include="Particular.Licensing.Sources" Version="6.1.0" />
     <PackageVersion Include="Particular.LicensingComponent.Report" Version="1.0.0" />
-    <PackageVersion Include="Polly.Core" Version="8.5.2" />
+    <PackageVersion Include="Polly.Core" Version="8.6.4" />
     <PackageVersion Include="PropertyChanged.Fody" Version="4.1.0" />
     <PackageVersion Include="PropertyChanging.Fody" Version="1.30.3" />
     <PackageVersion Include="PublicApiGenerator" Version="11.4.6" />