ingest: fix broken doc link
@@ -849,7 +849,7 @@ is not null safe alternative, so an explict null check is needed.
=== Complex Conditionals
The `if` condition can be more then a simple equality check.
The full power of the <<modules-scripting-painless, Painless Scripting Language>> is available and
-running in the {painless}/painless-ingest-processor-context.html#null-safe-operator[ingest processor context].
+running in the {painless}/painless-ingest-processor-context.html[ingest processor context].
IMPORTANT: The value of ctx is read-only in `if` conditions.
