[Notebook] fix broken notebooks due to unescaped "s

notebooks/end2end_example/cnv_end2end_example.ipynb

@@ -574,7 +574,7 @@
     "target_dir = os.getenv(\"PYNQ_TARGET_DIR\", \"/home/xilinx/finn\")\n",
     "\n",
     "model = ModelWrapper(build_dir + \"/end2end_cnv_w1a1_synth.onnx\")\n",
-    "model = model.transform(MakePYNQDriver(platform="zynq"))\n",
+    "model = model.transform(MakePYNQDriver(platform=\"zynq\"))\n",
     "model = model.transform(DeployToPYNQ(ip, port, username, password, target_dir))\n",
     "model.save(build_dir + \"/end2end_cnv_w1a1_pynq_deploy.onnx\")"
    ]

notebooks/end2end_example/tfc_end2end_example.ipynb

@@ -1422,7 +1422,7 @@
    "source": [
     "from finn.transformation.fpgadataflow.make_pynq_driver import MakePYNQDriver\n",
     "model = ModelWrapper(build_dir + \"/tfc_w1_a1_post_synthesis.onnx\")\n",
-    "model = model.transform(MakePYNQDriver(platform="zynq"))"
+    "model = model.transform(MakePYNQDriver(platform=\"zynq\"))"
    ]
   },
   {