Revert the upgrade of python in tox

Issue-ID: INT-2287
Change-Id: I532bf1c9e4034dd26b8c9bc2a9b64da713e34da1
Signed-off-by: Marek Szwałkiewicz <marek.szwalkiewicz@external.t-mobile.pl>
diff --git a/tox.ini b/tox.ini
index 61c3150..49eb054 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@
 requires = pip >= 8
 
 [testenv]
-basepython = python3.10
+basepython = python3.8
 allowlist_externals =
   git
   sh