Update Makefile

change openlane version to MPW-5

Author: jeffdi

Makefile

@@ -23,7 +23,7 @@ SIM?=RTL
 export SKYWATER_COMMIT=c094b6e83a4f9298e47f696ec5a7fd53535ec5eb
 export OPEN_PDKS_COMMIT?=7519dfb04400f224f140749cda44ee7de6f5e095
 export PDK_MAGIC_COMMIT=7d601628e4e05fd17fcb80c3552dacb64e9f6e7b
-export OPENLANE_TAG=2022.04.08_02.45.18
+export OPENLANE_TAG=2021.11.23_01.42.34
 export MISMATCHES_OK=1
 
 # Install lite version of caravel, (1): caravel-lite, (0): caravel