update notebook for metpy 1.0

Author: kgoebber

pages/workshop/MetPy_Advanced/Isentropic Analysis.ipynb

@@ -567,7 +567,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.6"
+   "version": "3.8.6"
   },
   "pycharm": {
    "stem_cell": {