[release-branch.go1.11-security] go1.11.5

Change-Id: Ib957fc19ae0633f77e2a5a9219f7a11ceda3f092
Reviewed-on: https://team-review.git.corp.google.com/c/400909
Reviewed-by: Filippo Valsorda <valsorda@google.com>

VERSION

diff --git a/VERSION b/VERSION
index 2506b03..04364e1 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-go1.11.4
\ No newline at end of file
+go1.11.5
\ No newline at end of file