[Makefile] roll back open_pdks

Makefile

diff --git a/Makefile b/Makefile
index 3eaebf8..7c2fd6f 100644
--- a/Makefile
+++ b/Makefile
@@ -48,7 +48,7 @@
 SPECIAL_VOLTAGE_LIBRARY ?= sky130_fd_sc_hvl
 IO_LIBRARY ?= sky130_fd_io
 SKYWATER_COMMIT ?= f6f76f3dc99526c6fc2cfede19b5b1227d4ebde7
-OPEN_PDKS_COMMIT ?= ec43817ed9f58ff83c9d260ce981818023cb6d77
+OPEN_PDKS_COMMIT ?= 145911d09c439cd2a0db1e8d20b05e2dba8027c9
 
 .DEFAULT_GOAL := ship
 # We need portable GDS_FILE pointers...