[roll] Roll fuchsia [symbolizer-markup] Avoid nonstandard dependencies

Standard C++20 is enough for this.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1152195
Original-Revision: 188b391518da48f508bb4b777d915d064fe499d6
GitOrigin-RevId: 9cfa94ee84dcff774396377613b8ba94f838f506
Change-Id: I240172ee51966fdb7cd5955911f4b65825b493aa

Author: Roland McGrath

stem

@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="15e759a4b2a2de3184f330b16145dc91e1599508"/>
+             revision="188b391518da48f508bb4b777d915d064fe499d6"/>
   </projects>
   <hooks>
     <hook name="install-environment"