GITBOOK-41: Update invalid var name

SUMMARY.md

@@ -33,7 +33,7 @@
   * [Configuration](configuration/helm-charts/configuration.md)
   * [Resource limits](configuration/helm-charts/resource-limits.md)
 * [Misc configuration properties](configuration/misc-configuration-properties.md)
-* [Permissions](configuration/permissions/README.md)
+* [Required Kafka Permissions](configuration/permissions/README.md)
   * [Required Kafka ACLs](configuration/configuration/required-acls.md)
   * [MSK (+Serverless) Setup](configuration/permissions/msk-+serverless-setup.md)
 * [Complex configuration examples](configuration/configuration/complex-configuration-examples/README.md)

configuration/configuration-file.md

@@ -28,7 +28,7 @@ services:
     environment:
       KAFKA_CLUSTERS_0_NAME: local
       # other properties, omitted
-      spring.config.additional-location: /config.yml
+      SPRING_CONFIG_ADDITIONAL-LOCATION: /config.yml
     volumes:
       - /tmp/config.yml:/config.yml
 ```

configuration/rbac-role-based-access-control.md

@@ -26,7 +26,7 @@ services:
     environment:
       KAFKA_CLUSTERS_0_NAME: local
       # other properties, omitted
-      spring.config.additional-location: /roles.yml
+      SPRING_CONFIG_ADDITIONAL-LOCATION: /roles.yml
     volumes:
       - /tmp/roles.yml:/roles.yml
 ```