CI: bump to MATLAB R2023b

(manually cherry picked from commit c4243664)

.gitlab-ci.yml

 variables:
   GIT_SUBMODULE_STRATEGY: recursive
   TERM: linux
-  MATLAB_VERSION: R2023a
+  MATLAB_VERSION: R2023b
   OLD_MATLAB_VERSION: R2014a
 
 # The next stanza creates the version number used for the source tarball and the

dseries @ 6a1c9211

-Subproject commit 22f39ecf498ac7943f9c91be72013ec2aa4643b0
+Subproject commit 6a1c9211cacf4c4f7535ab6c3c6d59cbef7dc107

reporting @ e91f7575

-Subproject commit 5fbaaea5dbd447179f23c576913001003ef5a107
+Subproject commit e91f7575077901d8726214d1b5ed81ba931fe2ff