Bump cache version

cdce8p · web-flow · commit 7f7714b3cee9 · 2021-12-27T20:14:09.000+01:00
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
@@ -8,7 +8,7 @@ on:
   pull_request: ~
 
 env:
-  CACHE_VERSION: 3
+  CACHE_VERSION: 4
   DEFAULT_PYTHON: 3.8
   PRE_COMMIT_CACHE: ~/.cache/pre-commit
 
