Fix SetTitle escape sequence to use correct OSC format

### Problem The `SetTitle` method uses an incorrect escape sequence that causes the title text to appear in the terminal output instead of setting the window title. ### Root Cause - Current: `\033[2;` (CSI - Control Sequence Introducer) - Correct: `\033]2;` (OSC - Operating System Command) ### Fix Changed `[` to `]` in the escape sequence to use the proper OSC format for setting terminal window titles. ### Testing Verified the fix resolves text bleeding in multiple terminal emulators.