Remove extra space to fix broken doc versioned plugin reference build

Author: dedemorton

CHANGELOG.md

@@ -1,3 +1,6 @@
+## 5.1.6
+ - Docs: Fix broken link by removing extra space. 
+
 ## 5.1.5
  - Docs: Fixed section ID that was causing doc build errors in the versioned
 plugin docs. 

VERSION

@@ -1 +1 @@
-5.1.5
+5.1.6

docs/index.asciidoc

@@ -90,7 +90,7 @@ This plugin supports the following configuration options plus the <<plugins-{typ
 [cols="<,<,<",options="header",]
 |=======================================================================
 |Setting |Input type|Required
-| <<plugins-{type}s-{plugin}-add_hostname>> |<<boolean, boolean>>|No
+| <<plugins-{type}s-{plugin}-add_hostname>> |<<boolean,boolean>>|No
 | <<plugins-{type}s-{plugin}-cipher_suites>> |<<array,array>>|No
 | <<plugins-{type}s-{plugin}-client_inactivity_timeout>> |<<number,number>>|No
 | <<plugins-{type}s-{plugin}-host>> |<<string,string>>|No