CICD: Pin NumPy version to <2 for PyBullet

Author: stephane-caron

tox.ini

@@ -14,7 +14,7 @@ deps =
     coverage >=5.5
     idyntree >= 8.0.0
     mujoco >=2.3.5
-    numpy >=1.23.4
+    numpy >=1.23.4,<2
     pin >=2.6.14
     pybullet >=3.2.5
     robomeshcat >= 1.0.4
@@ -68,7 +68,7 @@ commands =
 [testenv:loader-pybullet]
 changedir = {toxinidir}/tests/loaders
 deps =
-    numpy >=1.23.4
+    numpy >=1.23.4,<2
     pybullet >=3.2.5
 commands =
     python -m unittest test_pybullet.py