docs: windows venv fix

Author: tjbell

README.md

@@ -20,7 +20,7 @@ Once that completes, also run this command from the same folder.
 
 Windows
 ```
-\venv\Scripts\activate.bat
+venv\Scripts\activate.bat
 ```
 
 macOS & Linux
@@ -46,4 +46,4 @@ Every time you want to check your work locally you can type that command, and it
 
 ### Previewing Your Work
 
-You can preview your work by running `flask run` in the root of your fork and then visit`http://localhost:5000` in your browser.
+You can preview your work by running `flask run` in the root of your fork and then visit`http://localhost:5000` in your browser.