README.md: Fix cmd.exe instructions

README.md

@@ -11,7 +11,7 @@ A scribble of a python script for audio transcription.
   - Windows (PowerShell): `.venv\Scripts\Activate.ps1`
     - If PowerShell refuses with “running scripts is disabled on this system,” run
       `Set-ExecutionPolicy -Scope CurrentUser RemoteSigned` once, then try activation again.
-  - Windows (cmd.exe): `venv\Scripts\activate.bat`
+  - Windows (cmd.exe): `.venv\Scripts\activate.bat`
 3. Build & Install: `pip install -e .`
 
 ## Usage