Update RELEASE_NOTES.md for 1.5.22 release

[Arkatufus]

[1.5.22] / 4 June 2024

• Update Akka.NET to 1.5.22
• Add log filtering extension method

Filtering Logs In Akka.NET

In Akka.NET 1.5.21, we introduced log filtering for log messages based on the LogSource or the content of a log message. Depending on your coding style, you can use this feature in Akka.Hosting in several ways.

1. Using The LoggerConfigBuilder.WithLogFilter() method.

   The LoggerConfigBuilder.WithLogFilter() method lets you set up the LogFilterBuilder

   builder.Services.AddAkka("MyActorSystem", configurationBuilder =>
   {
       configurationBuilder
           .ConfigureLoggers(loggerConfigBuilder =>
           {
               loggerConfigBuilder.WithLogFilter(filterBuilder =>
               {
                   filterBuilder.ExcludeMessageContaining("Test");
               });
           });
   });

2. Setting the loggerConfigBuilder.LogFilterBuilder property directly.

   builder.Services.AddAkka("MyActorSystem", configurationBuilder =>
   {
       configurationBuilder
           .ConfigureLoggers(loggerConfigBuilder =>
           {
               loggerConfigBuilder.LogFilterBuilder = new LogFilterBuilder();
               loggerConfigBuilder.LogFilterBuilder.ExcludeMessageContaining("Test");
           });
   });

[Aaronontheweb]

LGTM