Update jupyter.rst (#3630)

Pinpoint IPython==8.21.0 for Google Colab, because more recent versions are incompatible with their runtime.

Author: abul4fia

docs/source/installation/jupyter.rst

@@ -71,7 +71,7 @@ then execute it.
        texlive-latex-recommended texlive-science \
        tipa libpango1.0-dev
    !pip install manim
-   !pip install IPython --upgrade
+   !pip install IPython==8.21.0
 
 You should start to see Colab installing all the dependencies specified
 in these commands. After the execution has completed, you will be prompted