fixed  redirection for https://issues.apache.org/jira/browse/IGNITE-13589 (#39)

diff --git a/.htaccess b/.htaccess
index adcea49..c049535 100644
--- a/.htaccess
+++ b/.htaccess
@@ -160,7 +160,7 @@
 RewriteRule ^releases/(.*)/(javadoc|scaladoc|cppdoc|dotnetdoc)/(.*)$ /releases/latest/$2/ [R=301,L]
 
 #rewrite for user docs .html files
-RewriteRule ^docs$ /docs/latest/ [R=301,L]
+RewriteRule ^docs/?$ /docs/latest/ [R=301,L]
 RewriteRule ^docs/latest$ /docs/latest/ [R=301,L]
 RewriteRule ^docs/latest/(.*)$ /docs/2.9.0/$1 [L]