Fix name of python3.8 alpine image

Photonios · Photonios · commit 66ab26a72638 · 2019-05-23T10:21:21.000+03:00
diff --git a/.circleci/config.yml b/.circleci/config.yml
@@ -68,7 +68,7 @@ jobs:
 
     test-python38:
         docker:
-            - image: python:3.8-alpine
+            - image: python:3.8-rc-alpine
             - image: postgres:11.0
               environment:
                   POSTGRES_DB: 'psqlextra'
