Changed .env to .venv in README.rst

Author: evaherrada

README.rst

@@ -80,15 +80,15 @@ To build this bundle locally you'll need to install the
 
 .. code::
 
-    python3 -m venv .env
-    source .env/bin/activate
+    python3 -m venv .venv
+    source .venv/bin/activate
     pip install circuitpython-build-tools
 
 Once installed, make sure you are in the virtual environment:
 
 .. code::
 
-    source .env/bin/activate
+    source .venv/bin/activate
 
 Then run the build: