Update dependency StackExchange.Redis to v2.7.33

Author: renovate[bot]

StackExchangeRedis/NHibernate.Caches.StackExchangeRedis/NHibernate.Caches.StackExchangeRedis.csproj

@@ -26,7 +26,7 @@
     <PackageReference Include="Iesi.Collections" Version="4.0.4" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="all" />
     <PackageReference Include="NHibernate" Version="5.2.0" />
-    <PackageReference Include="StackExchange.Redis" Version="2.0.495" />
+    <PackageReference Include="StackExchange.Redis" Version="2.7.33" />
   </ItemGroup>
   <ItemGroup>
     <Content Include="../../readme.md">