Update with ATT&CK 14.0

Author: Jack Sheriff

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changes to ATT&CK in STIX 2.1
 
+## 31 October 2023 - ATT&CK Spec v3.2.0
+
+Changes to ATT&CK in STIX for October 2023 ATT&CK Content Release (ATT&CK v14.0)
+
+* Added Asset objects. For detailed information about the representation of Assets in ATT&CK/STIX, please see the assets section of the [USAGE document](https://github.com/mitre-attack/attack-stix-data/blob/master/USAGE.md#assets).
+
 ## 25 April 2023 - ATT&CK Spec v3.1.0
 
 Changes to ATT&CK in STIX for April 2023 ATT&CK Content Release (ATT&CK v13.0)