fix: Sentry.Serilog throws with a disabled DSN (#2883)

Author: jamescrosswell

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Fixes
 
 - Android native symbol upload ([#2876](https://github.com/getsentry/sentry-dotnet/pull/2876))
+- Sentry.Serilog no longer throws if a disabled DSN is provided when initializing Sentry via the Serilog integration ([#2883](https://github.com/getsentry/sentry-dotnet/pull/2883))
 
 ### .NET target frameworks changes
 

src/Sentry.Serilog/SentrySinkExtensions.cs

@@ -1,4 +1,5 @@
 // ReSharper disable once CheckNamespace - Discoverability
+
 namespace Serilog;
 
 /// <summary>
@@ -189,7 +190,7 @@ public static void ConfigureSentrySerilogOptions(
         bool? initializeSdk = null,
         Dictionary<string, string>? defaultTags = null)
     {
-        if (!string.IsNullOrWhiteSpace(dsn))
+        if (dsn is not null)
         {
             sentrySerilogOptions.Dsn = dsn;
         }