Updated omc version

The previous version did not work if the parameter keyword was removed from the function surfaceTemperature (the keyword has to be removed per the MSL definition) because the function assigns this value to a member of the record that is a parameter, which only newer versions of OpenModelica support

.travis.yml

@@ -32,7 +32,7 @@ env:
   global:
     - DOCKER_REPONAME=lbnlblum
     - [email protected]
-    - OMC_VERSION=ubuntu-2204-omc:1.22.0_dev-41-g8a5b18f-1
+    - OMC_VERSION=ubuntu-2204-omc:1.23.0-1
     - OPTIMICA_VERSION=travis-ubuntu-2204-optimica:1.43.4_rev-1
     - DYMOLA_VERSION=travis_ubuntu-2004_dymola:2023x-x86_64_rev-1
     - ENERGYPLUS_VERSION=EnergyPlus-9.6.0-f420c06a69-Linux-Ubuntu20.04-x86_64