COMPMID-3015: Update release notes for 19.08.1

Signed-off-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Change-Id: I762542bcd20b1e64f378f11b7152fd7e369b3f78
diff --git a/docs/00_introduction.dox b/docs/00_introduction.dox
index ca9e7e3..bcbc818 100644
--- a/docs/00_introduction.dox
+++ b/docs/00_introduction.dox
@@ -236,6 +236,9 @@
 
 @subsection S2_2_changelog Changelog
 
+v19.08.1 Public maintanance release
+ - Various bug fixes.
+
 v19.08 Public major release
  - Various bug fixes.
  - Various optimisations.