[docs] [issue39233] glossary entry for parameter out-of-date for positional-only parameters

Change by miss-islington mariatta.wijaya+miss-islington@gmail.com:

---------- pull_requests: +17314 pull_request: https://github.com/python/cpython/pull/17902

_______________________________________ Python tracker report@bugs.python.org https://bugs.python.org/issue39233 _______________________________________