Raise memory limit so test passes with dynamic linking

The memory leak test fails with `RAW: mmap error: 12` when dynamic
linking is enabled. This is probabably because
of the additional memory overhead dynamic linking incurs. Raising it slightly
appears to satisfy the test.

Tested:
    TAP --sample ran all affected tests and none failed
    http://test/OCL:650692833:BASE:650634362:1720548680801:c55c6a68
PiperOrigin-RevId: 651750900
Change-Id: Ia63d153b326ff7451391789e2d7cae50a62be723

python/mujoco/memory_leak_test.py

@@ -40,7 +40,7 @@ class MemoryLeakTest(absltest.TestCase):
       </worldbody>
     </mujoco>
     """)
-    limit = self._memory_limit(4 * 2**30)
+    limit = self._memory_limit(4 * 2**32)
     try:
       model = mujoco.MjModel.from_xml_string(model_xml)
       data = mujoco.MjData(model)