allow congestion - dont know why had to enable this but all builds were failing, even with only 1 macro placed

openlane/user_project_wrapper/config.tcl

diff --git a/openlane/user_project_wrapper/config.tcl b/openlane/user_project_wrapper/config.tcl
index fec5ad7..e167199 100755
--- a/openlane/user_project_wrapper/config.tcl
+++ b/openlane/user_project_wrapper/config.tcl
@@ -82,7 +82,7 @@
 # these get generated - if a project specifies obstruction in the info.yaml
 #source user_project_wrapper/obstruction.tcl
 
-#set ::env(GLB_RT_ALLOW_CONGESTION) "1"
+set ::env(GLB_RT_ALLOW_CONGESTION) "1"
 
 #Reduction in the routing capacity of the edges between the cells in the global routing graph. Values range from 0 to 1.
 #1 = most reduction, 0 = least reduction