Update on_update.sh with new RHL9 paths

files/broker/on_update.sh

@@ -2,11 +2,11 @@
 
 cd
 # To make sure we have a decent GCC in our path.
-source /opt/rh/devtoolset-7/enable
+source /opt/rh/gcc-toolset-12/enable
 
 # Use a newer Boost.
-export LIBRARY_PATH=/usr/lib64/boost169
-export CPATH=/usr/include/boost169
+export LIBRARY_PATH=/usr/lib64
+export CPATH=/usr/include/boost
 
 cd src/broker
 make clean
@@ -16,4 +16,3 @@ cd
 mkdir -p bin/
 rm -f bin/broker
 cp src/broker/broker bin/
-