MM-41813 Fix path to fonts loaded by plugin

[hmhealey]

Summary

The Boards plugin has been trying to load the fonts that it packages from the wrong place for a while now. These fonts aren't actually necessary because the MM web app also loads the same fonts from a different location (/static/<some-hash>.woff2), but I figured it would be less likely to break something if I fixed that instead of removing the CSS that includes that font file.

Ticket Link

https://mattermost.atlassian.net/browse/MM-41813

[mattermost-build]

Cherry pick is scheduled.

[mattermost-build]

Error trying doing the automated Cherry picking. Please do this manually

+++ Updating remotes...
Fetching upstream
Failed to add the RSA host key for IP address '140.82.114.3' to the list of known hosts (/app/.ssh/known_hosts).
From github.com:mattermost/focalboard
   3625c535..4038d847  main               -> upstream/main
   dca1b064..b8a51306  release-7.11       -> upstream/release-7.11
 * [new tag]           cloud-2023-08-09-1 -> cloud-2023-08-09-1
Fetching origin
Failed to add the RSA host key for IP address '140.82.114.3' to the list of known hosts (/app/.ssh/known_hosts).
+++ Updating remotes done...
+++ Creating local branch automated-cherry-pick-of-focalboard-#4852-upstream-release-7.11-1691690878
Switched to a new branch 'automated-cherry-pick-of-focalboard-#4852-upstream-release-7.11-1691690878'
Branch 'automated-cherry-pick-of-focalboard-#4852-upstream-release-7.11-1691690878' set up to track remote branch 'release-7.11' from 'upstream'.

+++ About to attempt cherry pick of PR #4852 with merge commit 4038d8471e37e0e0a4ca82f7f21b649782b48e75.

error: commit 4038d8471e37e0e0a4ca82f7f21b649782b48e75 is a merge but no -m option was given.
fatal: cherry-pick failed
!!! git cherry-pick failed

+++ Aborting in-progress git cherry-pick.

+++ Returning you to the main branch and cleaning up.