Add links to GitHub repository and builds on docs.python.org for Poli…

…sh docs translations (python#607)

Remove e-mail link

Co-authored-by: Maciej Olko <maciej.olko@yougov.com>
Co-authored-by: Carol Willing <carolcode@willingconsulting.com>

documenting.rst

@@ -1624,6 +1624,7 @@ in production, other are work in progress:
 +-----------------+-------------------------------+----------------------------+
 | Polish (pl) | | `GitHub <github_pl_>`_ |
 | | | `Translations <tx_pl_>`_ |
+| | | `Doc <doc_pl_>`_ |
 +-----------------+-------------------------------+----------------------------+
 | Portuguese (pt) | Gustavo Toffo | |
 +-----------------+-------------------------------+----------------------------+
@@ -1657,6 +1658,7 @@ in production, other are work in progress:
 .. _chat_pt_br: https://t.me/pybr_i18n
 .. _doc_ja: https://docs.python.org/ja/
 .. _doc_ko: https://docs.python.org/ko/
+.. _doc_pl: https://docs.python.org/pl/
 .. _doc_zh_cn: https://docs.python.org/zh-cn/
 .. _doc_zh_tw: https://docs.python.org/zh-tw/
 .. _github_ar: https://github.com/Abdur-rahmaanJ/py-docs-ar