configure icon for tip in README [skip ci]

mojavelinux · mojavelinux · commit 8cfdb0a0a139 · 2023-11-18T01:56:46.000-07:00
diff --git a/README.adoc b/README.adoc
@@ -7,6 +7,7 @@
 :toc: macro
 ifdef::env-github[]
 :important-caption: :exclamation:
+:tip-caption: :bulb:
 :!toc-title:
 :badges:
 endif::[]
