package/rabbitmq-server: replace RABBITMQ_SERVER_CPE_ID_VENDOR

pivotal_software has been replaced by vmware in March 2022:

 <cpe-item name="cpe:/a:pivotal_software:rabbitmq:3.7.28" deprecated="true" deprecation_date="2022-03-17T14:05:30.170Z">
      <reference href="https://www.rabbitmq.com/">Product</reference>
      <reference href="https://github.com/rabbitmq/rabbitmq-server/releases">Change Log</reference>
    <cpe-23:cpe23-item name="cpe:2.3:a:pivotal_software:rabbitmq:3.7.28:*:*:*:*:*:*:*">
        <cpe-23:deprecated-by name="cpe:2.3:a:vmware:rabbitmq:3.7.28:*:*:*:*:*:*:*" type="NAME_CORRECTION"/>

https://nvd.nist.gov/products/cpe/search/results?namingFormat=2.3&keyword=cpe%3A2.3%3Aa%3Avmware%3Arabbitmq

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit e5189a09d7a2667bf4e12020a262c449949a53a5)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/rabbitmq-server/rabbitmq-server.mk

@@ -32,7 +32,7 @@ RABBITMQ_SERVER_LICENSE_FILES = \
 	LICENSE-MPL-RabbitMQ \
 	LICENSE-MPL2 \
 	LICENSE-rabbitmq_aws
-RABBITMQ_SERVER_CPE_ID_VENDOR = pivotal_software
+RABBITMQ_SERVER_CPE_ID_VENDOR = vmware
 RABBITMQ_SERVER_CPE_ID_PRODUCT = rabbitmq
 RABBITMQ_SERVER_SELINUX_MODULES = rabbitmq