Fix notebook: Colab now has python 3.9, bump it in our tricks

notebooks/OpenFold.ipynb

@@ -125,7 +125,7 @@
         "    %shell conda install -y -q -c conda-forge -c bioconda \\\n",
         "      kalign2=2.04 \\\n",
         "      hhsuite=3.3.0 \\\n",
-        "      python=3.8 \\\n",
+        "      python=3.9 \\\n",
         "      2>&1 1>/dev/null\n",
         "    %shell pip install -q \\\n",
         "      ml-collections==0.1.0 \\\n",
@@ -184,7 +184,7 @@
         "\n",
         "    %shell conda install -y -q -c conda-forge openmm=7.5.1\n",
         "    # Apply OpenMM patch.\n",
-        "    %shell pushd /opt/conda/lib/python3.8/site-packages/ && \\\n",
+        "    %shell pushd /opt/conda/lib/python3.9/site-packages/ && \\\n",
         "        patch -p0 < /content/openfold/lib/openmm.patch && \\\n",
         "        popd\n",
         "    %shell conda install -y -q -c conda-forge pdbfixer=1.7\n",
@@ -221,8 +221,8 @@
         "import unittest.mock\n",
         "import sys\n",
         "\n",
-        "sys.path.insert(0, '/usr/local/lib/python3.8/site-packages/')\n",
-        "sys.path.append('/opt/conda/lib/python3.8/site-packages')\n",
+        "sys.path.insert(0, '/usr/local/lib/python3.9/site-packages/')\n",
+        "sys.path.append('/opt/conda/lib/python3.9/site-packages')\n",
         "\n",
         "# Allows us to skip installing these packages\n",
         "unnecessary_modules = [\n",