Update modules/dynamic-plugins/ref-community-plugins-migration.template.adoc

Co-authored-by: Nick Boldt <[email protected]>

Author: josephca

modules/dynamic-plugins/ref-community-plugins-migration.template.adoc

@@ -27,7 +27,7 @@ Starting with {product-short} 1.9, community plugins are:
 
 * Built using GitHub Actions from the link:https://github.com/redhat-developer/rhdh-plugin-export-overlays[rhdh-plugin-export-overlays] repository
 * Published to `ghcr.io/redhat-developer/rhdh-plugin-export-overlays`
-* Referenced using OCI registry paths like `oci://ghcr.io/redhat-developer/rhdh-plugin-export-overlays/<plugin-name>:<tag>`
+* Referenced using OCI registry paths like `oci://ghcr.io/redhat-developer/rhdh-plugin-export-overlays/<plugin-name>:<tag>`, or ideally by a SHA digest
 
 == Migration steps