updated log message (#3201)

Author: bitsandfoxes

src/Sentry/GlobalSessionManager.cs

@@ -434,7 +434,8 @@ public IReadOnlyList<SessionUpdate> ResumeSession()
     {
         if (_currentSession is not { } session)
         {
-            _options.LogDebug("Failed to report an error on a session because there is none active.");
+            _options.LogDebug("There is no session active. Skipping updating the session as errored. " +
+                              "Consider setting 'AutoSessionTracking = true' to enable Release Health and crash free rate.");
             return null;
         }
 

test/Sentry.Tests/GlobalSessionManagerTests.cs

@@ -159,7 +159,7 @@ public void ReportError_ActiveSessionDoesNotExist_LogsOutError()
 
         // Assert
         _fixture.Logger.Entries.Should().Contain(e =>
-            e.Message == "Failed to report an error on a session because there is none active." &&
+            e.Message == "There is no session active. Skipping updating the session as errored. Consider setting 'AutoSessionTracking = true' to enable Release Health and crash free rate." &&
             e.Level == SentryLevel.Debug);
     }