fix: upgrade @material-ui/core from 4.9.5 to 4.9.7

Snyk has created this PR to upgrade @material-ui/core from 4.9.5 to 4.9.7.

See this package in NPM:
https://www.npmjs.com/package/@material-ui/core

See this project in Snyk:
https://app.snyk.io/org/coderbyheart/project/1ab786f4-04b1-43be-a4da-24473afa5df0?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -26,7 +26,7 @@
   "author": "Nordic Semiconductor ASA | nordicsemi.no",
   "license": "LICENSE",
   "dependencies": {
-    "@material-ui/core": "^4.9.5",
+    "@material-ui/core": "^4.9.7",
     "@material-ui/icons": "^4.9.1",
     "bootstrap": "^4.4.1",
     "leaflet": "^1.6.0",