added missing redir placeholder

KarlErickson · KarlErickson · commit ff5d793541e9 · 2020-10-26T10:46:46.000-07:00
diff --git a/docs-ref-conceptual/jdk/placeholder b/docs-ref-conceptual/jdk/placeholder
@@ -0,0 +1 @@
+do not remove this file - it's required to ensure that the folder exists at publication time so that generated redirection files can be added to it

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+do not remove this file - it's required to ensure that the folder exists at publication time so that generated redirection files can be added to it`