Remove some other pointers to beta package

Author: pobonomo

tox.ini

@@ -47,7 +47,7 @@ deps =
     seaborn
     gurobi11: gurobipy==11.0.3
     gurobi12: gurobipy==12.0.3
-    gurobi13: gurobipy==13.0.0beta1
+    gurobi13: gurobipy==13.0.0
 
 changedir = {toxinidir}/notebooks
 allowlist_externals = /usr/bin/make
@@ -86,7 +86,7 @@ deps =
     joblib
     gurobi11: gurobipy==11.0.3
     gurobi12: gurobipy==12.0.3
-    gurobi13: gurobipy==13.0.0beta1
+    gurobi13: gurobipy==13.0.0
 
 [testenv:{py310,py311,py312,py313}-keras-{gurobi11,gurobi12,gurobi13}]
 deps =