update skywater pdk commit hash

.travisCI/Makefile

diff --git a/.travisCI/Makefile b/.travisCI/Makefile
index d6bb932..6382bff 100644
--- a/.travisCI/Makefile
+++ b/.travisCI/Makefile
@@ -17,7 +17,7 @@
 OPEN_PDKS_ROOT ?= $(shell pwd)/..
 THREADS ?= $(shell nproc)
 STD_CELL_LIBRARY ?= sky130_fd_sc_hd
-SKYWATER_COMMIT ?= 5cd70ed19fee8ea37c4e8dbd5c5c3eaa9886dd23
+SKYWATER_COMMIT ?= d8e2cf1ba006ed01468aa60e7f4e85a1ece74ca4
 
 .DEFAULT_GOAL := all