Add missing digit to the year of release date for 11.3

Reported by:	Herbert J. Skuhra <herbert@gojira.at>
Sponsored by:	Klara Inc.

website/content/en/security/unsupported.adoc

@@ -48,7 +48,7 @@ The following releases are no longer supported but are listed here for reference
 |releng/11.0 |11.0-RELEASE |n/a |October 10, 2016 |November 30, 2017
 |releng/11.1 |11.1-RELEASE |n/a |July 26, 2017 |September 30, 2018
 |releng/11.2 |11.2-RELEASE |n/a |June 28, 2018 |October 31, 2019
-|releng/11.3 |11.3-RELEASE |n/a |July 9, 201 |September 30, 2020
+|releng/11.3 |11.3-RELEASE |n/a |July 9, 2019 |September 30, 2020
 |releng/12.0 |12.0-RELEASE |n/a |December 11, 2018 |February 29, 2020
 |releng/12.1 |12.1-RELEASE |n/a |November 4, 2019 |January 31, 2021
 |===