chore(deps): update redis docker tag to v7 (#2831)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

docker-compose.yml

@@ -13,7 +13,7 @@ services:
         depends_on:
         - atlantis
     redis:
-        image: redis:6.2-alpine
+        image: redis:7.0-alpine
         restart: always
         ports:
         - '6379:6379'