Fix documentation: remove 'Alternative' reference for C implementation

Since Python implementations were removed, C implementations are now the primary (and only) implementations. Updated README.md to remove the '(Alternative)' designation.

README.md

@@ -58,7 +58,7 @@ The system consists of components implemented in C for optimal performance:
     - Handles file transfers through secure tunnels
     - Uses shared libraries for WebSocket, SSL, and tunnel management
 
-### C Implementation (Alternative)
+### C Implementation
 Located in the `wssshtools/` directory:
 
 1. **`wssshc`** - Lightweight C client for registration