Fix docs build error (#6072)

w5688414 · web-flow · commit 1d74603fed5f · 2023-06-01T19:53:00.000+08:00
diff --git a/docs/requirements.txt b/docs/requirements.txt
@@ -1,6 +1,7 @@
 # Defining the exact version will make sure things don't break
 
 urllib3==1.26.2    # fix urllib3 version dependency: https://github.com/psf/requests/issues/6432#issuecomment-1537221990
+scipy==1.9.1
 aiohttp==3.8.4
 numpy<1.27.0,>=1.19.5
 h11<0.13,>=0.11
