update default jupyer kernel in master notebook

4-GPU/HandsOn/.master/HandsOnGPUProgramming_master.ipynb

@@ -5169,9 +5169,9 @@
  "metadata": {
   "celltoolbar": "Edit Metadata",
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "SC19 S4 (Python 3 + GPU)",
    "language": "python",
-   "name": "python3"
+   "name": "session-4"
   },
   "language_info": {
    "codemirror_mode": {
@@ -5183,7 +5183,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.5"
+   "version": "3.7.0"
   },
   "toc": {
    "base_numbering": 1,