Update Rocky Linux 8.7

roles/netbootxyz/defaults/main.yml

@@ -427,6 +427,8 @@ releases:
     versions:
     - code_name: 9.0
       name: 9.0
+    - code_name: 8.7
+      name: 8.7
     - code_name: 8.6
       name: 8.6
     - code_name: 8.5