Correcting verbs to the present tense

Co-authored-by: Arun Babu Neelicattu <[email protected]>

Author: tats-u

install-poetry.py

@@ -272,7 +272,7 @@ def _get_win_folder_with_ctypes(csidl_name):
 POST_MESSAGE_CONFIGURE_WINDOWS = """
 You can choose and execute one of the following commands in PowerShell:
 
-A. Appends the bin directory to your user environment variable `PATH`:
+A. Append the bin directory to your user environment variable `PATH`:
 
 ```
 [Environment]::SetEnvironmentVariable("Path", [Environment]::GetEnvironmentVariable("Path", "User") + ";{poetry_home_bin}", "User")