Update requirements for "Read the Docs"

Cito · Cito · commit d71376e5b68b · 2021-12-04T20:28:03.000+01:00
diff --git a/docs/requirements.txt b/docs/requirements.txt
@@ -1,2 +1,2 @@
-sphinx>=3.5,<4
-sphinx_rtd_theme>=0.5,<1
+sphinx>=4.3,<5
+sphinx_rtd_theme>=1,<2
