Fix Colab by using OF commit from pl_upgrades

The commit used so far now fails with Colab's numpy.
(Commit from current main does not work either.)

notebooks/OpenFold.ipynb

@@ -136,7 +136,7 @@
         "\n",
         "    %shell mkdir -p /content/openfold/openfold/resources\n",
         "\n",
-        "    commit = \"e2e19f16676b1a409f9ba3a6f69b11ee7f5887c2\"\n",
+        "    commit = \"49ab0539547b9ae921d8bc7c2beb106e085fc3cf\"\n",
         "    os.system(f\"pip install -q git+https://github.com/aqlaboratory/openfold.git@{commit}\")\n",
         "\n",
         "    os.system(f\"cp -f -p /content/stereo_chemical_props.txt /usr/local/lib/python{python_version}/site-packages/openfold/resources/\")\n",