Exclude bootstrap-sass from yarn audit

This package is being brought in by patternfly, and we are already at
the latest version. We need to upgrade patternfly or replace it
completely to be off of this package.

.yarnrc.yml

@@ -16,6 +16,8 @@ npmAuditExcludePackages:
 # pending | low      | GHSA-mqm9-c95h-x2p6 | angular <=1.8.3              | 1.8.3 brought in by manageiq-ui-classic@workspace:.
 - bootstrap
 # pending | moderate | GHSA-9mvj-f7w8-pvh2 | bootstrap >=2.0.0 <=3.4.1 | 3.4.1 brought in by patternfly@npm:3.59.5
+- bootstrap-sass
+# pending | moderate | GHSA-9mvj-f7w8-pvh2 | bootstrap-sass >=2.0.0 <=3.4.3 | 3.4.3 brought in by patternfly@npm:3.59.5
 - jquery
 # pending | moderate | GHSA-rmxg-73gg-4p98 | jquery >=1.12.3 <3.0.0 | 2.2.4 brought in by manageiq-ui-classic@workspace:.
 # pending | moderate | GHSA-gxr4-xjj5-5px2 | jquery >=1.2.0 <3.5.0  | 2.2.4, 3.4.1 brought in by manageiq-ui-classic@workspace:., patternfly@npm:3.59.5