CSS: Fix -webkit-touch-callout property value in phui-workcard.css
Summary:
`-webkit-touch-callout: text;` is an invalid property value.
Likely `-webkit-touch-callout: default;` was meant, per Syntax definition on https://developer.mozilla.org/en-US/docs/Web/CSS/-webkit-touch-callout
Test Plan: Unknown. Likely use Safari browser on iOS and long-press on elements in a project workboard card. See also https://caniuse.com/?search=-webkit-touch-callout
Reviewers: O1 Blessed Committers, mainframe98
Reviewed By: O1 Blessed Committers, mainframe98
Subscribers: mainframe98, tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Differential Revision: https://we.phorge.it/D26465