Update index.md

Fixing the ATT&CK Navigator link

docs/resources/updates/index.md

@@ -90,7 +90,7 @@ Information about the latest CAR updates and changes can be found in this sectio
 * Updated ATT&CK Detection for all analytics for [latest ATT&CK release](https://attack.mitre.org/resources/updates/updates-july-2020/).
 
 ### May 2020
-* Updated [ATT&CK Navigator layer](https://mitre-attack.github.io/attack-navigator/beta/enterprise/#layerURL=https%3A%2F%2Fraw.githubusercontent.com%2Fmitre-attack%2Fcar%2Fmaster%2Fdocs%2Fcar_attack%2Fcar_attack.json) to incorporate sub-technique mappings for all CAR analytics.
+* Updated [ATT&CK Navigator layer](https://mitre-attack.github.io/attack-navigator/enterprise/#layerURL=https%3A%2F%2Fraw.githubusercontent.com%2Fmitre-attack%2Fcar%2Fmaster%2Fdocs%2Fcar_attack%2Fcar_attack.json) to incorporate sub-technique mappings for all CAR analytics.
 * Added [Sysmon 11.0](/sensors/sysmon_11.0) sensor with data model mappings and CAR analytic coverage.
 * Added one new field to the [Process object](/data_model/process)
   * `env_vars`