Remove "Public" from USERS in windows modify shell startup PBA

Otherwise it'll look for a profile.ps1 file in the Public folder too

monkey/infection_monkey/post_breach/shell_startup_files/windows/shell_startup_files_modification.py

@@ -13,6 +13,7 @@ def get_windows_commands_to_modify_shell_startup_files():
 
     # get list of usernames
     USERS = subprocess.check_output('dir C:\\Users /b', shell=True).decode().split("\r\n")[:-1]  # noqa: DUO116
+    USERS.remove("Public")
 
     STARTUP_FILES_PER_USER = ['\\'.join(SHELL_STARTUP_FILE_PATH_COMPONENTS[:2] +
                                         [user] +