add a redirect

Author: shuangela

config/redirects

@@ -12,6 +12,7 @@ raw: ${prefix}/stable -> ${base}/current/
 # General redirects
 [v2.20-*]: ${prefix}/${version}/whats-new/ -> ${base}/${version}/reference/release-notes/
 [v2.20-*]: ${prefix}/${version}/compatibility/ -> ${base}/${version}/reference/compatibility/
+[v2.20-*]: ${prefix}/${version}/getting-started/ -> ${base}/${version}/get-started/
 
 # redirects for 2.15