Fix doc generation

Missing requirements caused the build to fail to include autogenerated
doc text.

Signed-off-by: Simo Sorce <[email protected]>

Author: simo5

.readthedocs.yaml

@@ -30,6 +30,6 @@ formats:
 # Optional but recommended, declare the Python requirements required
 # to build your documentation
 # See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
-# python:
-#   install:
-#     - requirements: docs/requirements.txt
+python:
+  install:
+    - requirements: docs/requirements.txt

docs/requirements.txt

@@ -0,0 +1,2 @@
+cryptography >= 3.4
+typing_extensions >= 4.5.0