Bump version of pre-commit hooks (ros-controls#485)

Author: github-actions[bot]

.pre-commit-config.yaml

@@ -36,7 +36,7 @@ repos:
 
   # Python hooks
   - repo: https://github.com/asottile/pyupgrade
-    rev: v3.15.1
+    rev: v3.15.2
     hooks:
     -   id: pyupgrade
         args: [--py36-plus]