Bump numerical tolerance for agreement between TF and XLA log_probs for OneHotCategorical.

PiperOrigin-RevId: 386474297

Author: axch

tensorflow_probability/python/distributions/platform_compatibility_test.py

@@ -165,7 +165,7 @@
     'Kumaraswamy': 4e-5,
     'Logistic': 3e-6,
     'Multinomial': 2e-4,
-    'OneHotCategorical': 6e-6,
+    'OneHotCategorical': 1e-5,
     'PowerSpherical': 2e-5,
     'SigmoidBeta': 5e-4,
     'Skellam': 1e-4,