fix: Bump the edx-proctoring version to the latest.

Among other things, edx-proctoring has updated how its dependencies are
managed so it doesn't shrinkwrap its dependencies.  This allows us to
further upgrade dependencies in edx-platform and fixes an issue where we
had a required dependency on fsevents that was cropping up preventing us
from `npm install`ing cleanly on linux.

package.json

@@ -22,7 +22,7 @@
     "@babel/preset-react": "7.18.6",
     "@edx/brand-edx.org": "^2.0.7",
     "@edx/edx-bootstrap": "1.0.4",
-    "@edx/edx-proctoring": "^4.15.1",
+    "@edx/edx-proctoring": "^4.18.1",
     "@edx/frontend-component-cookie-policy-banner": "2.2.0",
     "@edx/paragon": "2.6.4",
     "@edx/studio-frontend": "^2.1.0",