Update clean-charts make target for new paths

Signed-off-by: killianmuldoon <[email protected]>

Author: killianmuldoon

Makefile

@@ -1160,7 +1160,7 @@ clean-tilt: clean-charts clean-kind ## Remove all files generated by Tilt
 
 .PHONY: clean-charts
 clean-charts: ## Remove all local copies of Helm charts in ./hack/observability
-	(for path in "./hack/observability/*"; do rm -rf $$path/charts ; done)
+	(for path in "./hack/observability/*"; do rm -rf $$path/.charts ; done)
 
 .PHONY: clean-book
 clean-book: ## Remove all generated GitBook files