docs: Fix clone path

Author: krlmlr

.sync/README.md

@@ -7,8 +7,8 @@ Initialize with:
 ```sh
 # --reference assumes that dplyr is checked out parallel to duckplyr
 cd .sync
-hub clone krlmlr/dplyr dplyr-main --reference ../../dplyr
-hub clone krlmlr/dplyr -b f-revdep-duckplyr dplyr-revdep --reference ../../dplyr
+hub clone krlmlr/dplyr dplyr-main --reference ../../../tidyverse/dplyr
+hub clone krlmlr/dplyr -b f-revdep-duckplyr dplyr-revdep --reference ../../../tidyverse/dplyr
 ```
 
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