Upgrade the Grails sample to Grails 3.3.9

wilkinsona · wilkinsona · commit 015468685ed9 · 2019-08-30T17:59:28.000+01:00
diff --git a/samples/rest-notes-grails/gradle.properties b/samples/rest-notes-grails/gradle.properties
@@ -1 +1 @@
-grailsVersion=3.3.2
+grailsVersion=3.3.9
