Update README.md

Author: SMI-Lab-Inha

README.md

@@ -9,7 +9,7 @@ Unofficial VS Code extension for OpenFAST, ROSCO, and TurbSim input and output f
 - Syntax highlighting for OpenFAST-style text input files such as `.fst`, `.dat`, `.in`, `.inp`, `.out`, `.ipt`, `.ech`, `.wnd`, `.sum`, and `.bmi`
 - Support for common OpenFAST module files including AeroDyn, ElastoDyn, HydroDyn, InflowWind, MoorDyn, ServoDyn, SeaState, and related driver files
 - Support for ROSCO-style `DISCON.in` controller files
-- Support for TurbSim input files (`.inp`)
+- Support for TurbSim input files (`.inp`, and `.in`)
 - Highlighting for:
   - section banners and `END` markers
   - booleans and special values like `default`, `unused`, and `none`