Fix link formatting and clarify the distinction between Manim versions in index.rst (#4131)

* Fix link formatting and clarify the distinction between Manim versions

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: irvanalhaq9

Diff for: docs/source/index.rst

@@ -22,7 +22,9 @@ in the right place!
 .. note::
 
    Please be aware that there are different, incompatible versions of Manim available.
-   ManimCE was forked from 3b1b/manim, originally created and open-sourced by Grant Sanderson, creator of [3Blue1Brown](https://www.youtube.com/channel/UCYO_jab_esuFRV4b17AJtAw) educational math videos.
+   This version, the Community Edition of Manim (`ManimCE <https://github.com/ManimCommunity/manim>`_),
+   is a separate project maintained by the community, but it was forked from `3b1b/manim <https://github.com/3b1b/manim>`_,
+   the original Manim created and open-sourced by Grant Sanderson, creator of `3Blue1Brown <https://www.youtube.com/channel/UCYO_jab_esuFRV4b17AJtAw>`_ educational math videos.
    Check our :ref:`installation FAQ <different-versions>`
    to learn more!