[core] upgrading ipython to latest version (#2775)

desktop/core/requirements.txt

@@ -31,7 +31,7 @@ eventlet==0.31.0
 future==0.18.2
 greenlet==0.4.15
 gunicorn==19.9.0
-ipython==7.16.3  # Last Python 3.6
+ipython==8.1.1  # Python >= 3.8
 jaeger-client==4.3.0
 jdcal==1.0.1
 kazoo==2.8.0