typo: Double word "to" (#2365)

Author: nschonni

locale/en/blog/vulnerability/june-2016-security-releases.md

@@ -75,7 +75,7 @@ Therefore, we expect to be releasing:
 While we anticipate minimal impact from the breaking changes, please be sure to review the details once they are released and make an assessment regarding the impact on your applications.
 
 Additional notes:
-* It is our intention to stop releasing critical updates for the v5 release line at the end of this month, you should migrate to to v6 or v4 LTS if you have not already done so.
+* It is our intention to stop releasing critical updates for the v5 release line at the end of this month, you should migrate to v6 or v4 LTS if you have not already done so.
 * In accordance with our security release procedures, we will be limiting changes included in the LTS and Maintenance lines (v4, v0.12 and v0.10) _for these updates_ to only security-related and critical fixes to provide maximum stability for users.
 
 ## V8 security defect