CI: Build on Fedora 33

Change-Id: I631945a7b0a7fd07eb99afcb4b274dc9a985b579
diff --git a/.zuul.yaml b/.zuul.yaml
index 53a36fb..71a4ff2 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -1,6 +1,6 @@
 - job:
     name: czechlight-clearfog
-    parent: run-ci-build-sh-f32
+    parent: run-ci-build-sh-f33
     timeout: 3600
     post-timeout: 600
     vars: