perf(vertico): reduce project-root calls by one

If operating on files that aren't in a project, marginalia suffers two
potentially expensive `projectile-project-root` calls per
file/directory. This reduces it to one.

modules/completion/vertico/config.el

@@ -341,8 +341,7 @@ orderless."
                           "\\`\\(?:Dired\\|Find file\\) in \\(.*\\): \\'"
                           prompt)
                          (match-string 1 prompt)))
-                  (and (doom-project-p)
-                       (doom-project-root)))))
+                  (doom-project-root))))
       marginalia--project-root)))