Bump lodash from 4.17.15 to 4.17.20 in /website

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.20.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.15...4.17.20)

Signed-off-by: dependabot[bot] <support@github.com>

website/package-lock.json

@@ -3487,13 +3487,6 @@
         "glob": "~7.1.1",
         "lodash": "~4.17.12",
         "minimatch": "~3.0.2"
-      },
-      "dependencies": {
-        "lodash": {
-          "version": "4.17.15",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
-          "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A=="
-        }
       }
     },
     "graceful-fs": {
@@ -4234,9 +4227,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.15",
+      "version": "4.17.20",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.20.tgz",
-      "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A=="
+      "integrity": "sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA=="
     },
     "lodash.get": {
       "version": "4.4.2",
@@ -4721,11 +4714,6 @@
             "which": "^1.2.9"
           }
         },
-        "lodash": {
-          "version": "4.17.15",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
-          "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A=="
-        },
         "lru-cache": {
           "version": "4.1.5",
           "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.5.tgz",