Update graphql api docs for unsetting compliance framework

run bundle exec rake gitlab:graphql:compile_docs

doc/api/graphql/reference/index.md

@@ -3757,7 +3757,7 @@ Input type: `ProjectSetComplianceFrameworkInput`
 | Name | Type | Description |
 | ---- | ---- | ----------- |
 | <a id="mutationprojectsetcomplianceframeworkclientmutationid"></a>`clientMutationId` | [`String`](#string) | A unique identifier for the client performing the mutation. |
-| <a id="mutationprojectsetcomplianceframeworkcomplianceframeworkid"></a>`complianceFrameworkId` | [`ComplianceManagementFrameworkID`](#compliancemanagementframeworkid) | ID of the compliance framework to assign to the project. |
+| <a id="mutationprojectsetcomplianceframeworkcomplianceframeworkid"></a>`complianceFrameworkId` | [`ComplianceManagementFrameworkID`](#compliancemanagementframeworkid) | ID of the compliance framework to assign to the project. Set to `null` to unset. |
 | <a id="mutationprojectsetcomplianceframeworkprojectid"></a>`projectId` | [`ProjectID!`](#projectid) | ID of the project to change the compliance framework of. |
 
 #### Fields

ee/app/graphql/mutations/projects/set_compliance_framework.rb

@@ -14,7 +14,7 @@ module Mutations
 
       argument :compliance_framework_id, Types::GlobalIDType[::ComplianceManagement::Framework],
                required: false,
-               description: 'ID of the compliance framework to assign to the project.'
+               description: 'ID of the compliance framework to assign to the project. Set to `null` to unset.'
 
       field :project,
             Types::ProjectType,