Add callout r.e. upcoming workshops

EllaKaye · EllaKaye · commit 603207390eac · 2026-05-11T11:02:33.000+01:00
diff --git a/index.qmd b/index.qmd
@@ -2,6 +2,12 @@
 title: "R package development workshop"
 ---
 
+::: {.callout-note}
+## Registration is now open for workshops running May-July 2026!
+
+See the [workshops](workshops.qmd) page for further details.
+:::
+
 Welcome to the Forwards R package development workshop!
 
 The modules use materials developed by Forwards, 
