add missing trailing /

Author: schmalliso

config/redirects

@@ -1537,7 +1537,7 @@ raw: /master/release-notes/3.0-general-improvements -> ${base}/release-notes/3.0
 
 [v3.6-v3.6]:  /${version}/upcoming -> ${base}/master/release-notes/4.0/
 
-raw: /v2.8 -> ${base}/v3.0
+raw: /v2.8 -> ${base}/v3.0/
 raw: /v2.8/release-notes/2.8-downgrade -> ${base}/v3.0/release-notes/
 raw: /v2.8/release-notes/2.8-compatibility -> ${base}/v3.0/release-notes/
 raw: /v2.8/release-notes/2.8-changes -> ${base}/v3.0/release-notes/