[DMAAP-DR] Fix doc build issue

Signed-off-by: efiacor <fiachra.corcoran@est.tech>
Change-Id: I13bef31d8313cbbe963fcdc401ffc8a725e842e4
Issue-ID: REQ-1568
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index cf0aae0..192952d 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -6,15 +6,13 @@
 version: 2
 
 build:
-  image: latest
+  os: ubuntu-20.04
+  tools:
+    python: "3.8"
 
 python:
-  version: 3.7
   install:
     - requirements: docs/requirements-docs.txt
 
-submodules:
-  include: all
-
 sphinx:
   configuration: docs/conf.py