Update requirements.txt

Author: haoershi

python/requirements.txt

@@ -1,7 +1,7 @@
 cachetools==5.2.0
 pennprov==2.2.4
 pyqt5-sip==12.9.0
-install==1.3.5
+install
 scipy==1.8.1
 matplotlib==3.5.2
 matplotlib-inline==0.1.3