Temporarily disable bm_dulwich_log benchmark

(cherry picked from commit 86a328d)

Author: msimacek

mx.graalpython/mx_graalpython_python_benchmarks.py

@@ -121,7 +121,7 @@
 DEFAULT_PYPY_BENCHMARKS = [
     "ai",
     # "bm_chameleon",
-    "bm_dulwich_log",
+    # "bm_dulwich_log",
     "bm_mako",
     "bm_mdp",
     "chaos",