Scope down Chrome version for icon fix

When checking the Chromium changelog, we can see that they backported
the SVG fix to: `84.0.4147.125` [0]. So we can actually scope our fix
deployment down to that version.

For Edge we have figured out which version to use based on it's
useragent: `84.0.522.59`, for example:

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML,
like Gecko) Chrome/84.0.4147.125 Safari/537.36 Edg/84.0.522.59

[0]: https://chromium.googlesource.com/chromium/src/+log/84.0.4147.89..84.0.4147.125?pretty=fuller&n=10000

app/views/layouts/_head.html.haml

@@ -68,7 +68,7 @@
     = yield :page_specific_javascripts
 
   = webpack_controller_bundle_tags
-  = webpack_bundle_tag "chrome_84_icon_fix" if browser.chrome?([">=84", "<85"]) || browser.edge?([">=84", "<85"])
+  = webpack_bundle_tag "chrome_84_icon_fix" if browser.chrome?([">=84", "<84.0.4147.125"]) || browser.edge?([">=84", "<84.0.522.59"])
 
   = yield :project_javascripts