Update time separator in smallNumbersContent string

The commit updates the formatting of the `smallNumbersContent` string in the `OSCController.cs` file, under the `vrcosc_magicchatbox.Classes.DataAndSecurity` namespace. The change involves replacing the colon (":") that separated `currentTime` and `fullTime` values with a vertical bar ("l"). This alteration affects the visual representation of the time span in the `smallNumbersContent` string, but does not impact the functionality of the code.

vrcosc-magicchatbox/Classes/DataAndSecurity/OSCController.cs

@@ -204,7 +204,7 @@ private static string CreateTimeStamp(string x, MediaSessionInfo mediaSession, M
                     break;
 
                 case MediaLinkTimeSeekbar.SmallNumbers:
-                    string smallNumbersContent = $"{DataController.TransformToSuperscript(FormatTimeSpan(currentTime) + " : " + FormatTimeSpan(fullTime))}";
+                    string smallNumbersContent = $"{DataController.TransformToSuperscript(FormatTimeSpan(currentTime) + " l " + FormatTimeSpan(fullTime))}";
                     if (CalculateOSCMsgLength(uncomplete, x + smallNumbersContent) <= 140)
                     {
                         return x + " " + smallNumbersContent;