Add notes to release process (#1251)

Signed-off-by: Carson Cook <[email protected]>

Author: CarsonCook

docs/release.md

@@ -12,7 +12,9 @@
     - [zowe-install-packaging/manifest.json.template](https://github.com/zowe/zowe-install-packaging/blob/master/manifest.json.template) needs to be updated to select a new minor or major version.
   - The major version number increases when a backward incompatible change is introduced.
   - The API ML is a part of the Zowe PAX file that is packaged by builds of the [zowe-install-packaging](https://github.com/zowe/zowe-install-packaging/) repository.
+    - When a new release is available for a release candidate, the [zowe-install-packaging/manifest.json.template file on the RC branch](https://github.com/zowe/zowe-install-packaging/blob/rc/manifest.json.template) needs to be updated so the `org.zowe.apiml.sdk.*` components have the proper version.
   - [Zowe Release Process](https://github.com/zowe/zlc/blob/master/process/release.md)
+  - Currently, there are issues with Gateway acceptance tests on the release pipeline. They can be disabled via `@Disabled` to allow a release.
 
 ## Jenkins release job