Only catch JsonException in the method that dispatches to the appropriate handlers

Author: mlorbetske

src/dotnet/commands/dotnet-run/LaunchSettings/LaunchSettingsManager.cs

@@ -82,7 +82,7 @@ public static LaunchSettingsApplyResult TryApplyLaunchSettings(string launchSett
 
                 return provider.TryApplySettings(model, profileObject, ref command);
             }
-            catch (Exception ex)
+            catch (JsonException ex)
             {
                 return new LaunchSettingsApplyResult(false, string.Format(LocalizableStrings.UnexpectedExceptionProcessingLaunchSettings, ex.Message));
             }