Add links to GitHub repository and builds on docs.python.org for Polish docs translations

Remove e-mail link

Author: Maciej Olko

documenting.rst

@@ -1622,8 +1622,9 @@ in production, other are work in progress:
 +-----------------+-------------------------------+----------------------------+
 | Lithuanian (lt) |                               | `mail <mail_lt_>`_         |
 +-----------------+-------------------------------+----------------------------+
-| Polish (pl)     |                               | `mail <mail_pl_>`_         |
-|                 |                               | `Translations <tx_pl_>`_   |
+| Polish (pl)     |                               | `Translations <tx_pl_>`_   |
+|                 |                               | `GitHub <github_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
@@ -1668,6 +1670,7 @@ in production, other are work in progress:
 .. _github_id: https://github.com/python/python-docs-id
 .. _github_ja: https://github.com/python/python-docs-ja
 .. _github_ko: https://github.com/python/python-docs-ko
+.. _github_pl: https://github.com/python/python-docs-pl
 .. _github_pt_br: https://github.com/python/python-docs-pt-br
 .. _github_tr: https://github.com/alaeddingurel/python-docs-tr
 .. _github_zh_cn: https://github.com/python/python-docs-zh-cn