Updated omc image to 1.26.3 (maint_12.x)#4536

mwetter wants to merge 3 commits intomaint_12.xlbl-srg/modelica-buildings:maint_12.xfrom

maint_12.x_issue4514_openmodelica_1_26_3lbl-srg/modelica-buildings:maint_12.x_issue4514_openmodelica_1_26_3Copy head branch name to clipboard