Move changelog entry from next patch to next minor

Author: MichelLosier

spec/changelog.yml

@@ -8,8 +8,6 @@
     - description: Add support for semantic_text field definition.
       type: enhancement
       link: https://github.com/elastic/package-spec/pull/807
-- version: 3.6.3-next
-  changes:
     - description: Add optional `release` field to agentless deployment mode to explicitly declare its release stage.
       type: enhancement
       link: https://github.com/elastic/package-spec/pull/1130