Updated the sky130/README file to include adding sky130_fd_io as a
submodule, since that is now available in the skywater-pdk repository.

VERSION

diff --git a/VERSION b/VERSION
index 4bf1778..9972f12 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.60
+1.0.61

sky130/README

diff --git a/sky130/README b/sky130/README
index acf9e0d..12952f5 100644
--- a/sky130/README
+++ b/sky130/README
@@ -34,6 +34,8 @@
     each supported IP library, do:
 
 	cd skywater-pdk
+	git submodule init libraries/sky130_fd_io/latest
+	git submodule init libraries/sky130_fd_pr/latest
 	git submodule init libraries/sky130_fd_sc_hd/latest
 	git submodule init libraries/sky130_fd_sc_hdll/latest
 	git submodule init libraries/sky130_fd_sc_hs/latest