Update Persian translation details (#1881)

Adds `@sepehr-rs` as coordinator and link to Telegram.

Co-authored-by: Stan Ulbrych <stan@python.org>

Author: sepehr-rs

documentation/translations/translating.rst

@@ -71,8 +71,10 @@ For more details about translations and their progress, see
      - Albertas Gimbutas (:github-user:`albertas`, `email <mailto:albertasgim@gmail.com>`__)
      - `original announcement <https://mail.python.org/pipermail/doc-sig/2019-July/004138.html>`__
    * - Persian (fa)
-     - Alireza Shabani (:github-user:`revisto`)
-     - :github:`GitHub <revisto/python-docs-fa>`
+     - | Alireza Shabani (:github-user:`revisto`),
+       | Sepehr Rasouli (:github-user:`sepehr-rs`)
+     - :github:`GitHub <revisto/python-docs-fa>`,
+       `Telegram <https://t.me/python_docs_farsi>`__
    * - `Polish (pl) <https://docs.python.org/pl/>`__
      - | Maciej Olko (:github-user:`m-aciek`),
        | Stan Ulbrych (:github-user:`StanFromIreland`)