[error-tracking] List possible includes in API doc (#3003)

Co-authored-by: ci.datadog-api-spec <packages@datadoghq.com>

Author: api-clients-generation-pipeline[bot]

.generator/schemas/v2/openapi.yaml

@@ -449,7 +449,7 @@ components:
         type: string
     GetIssueIncludeQueryParameter:
       description: Comma-separated list of relationship objects that should be included
-        in the response.
+        in the response. Possible values are `assignee`, `case`, and `team_owners`.
       explode: false
       in: query
       name: include
@@ -996,7 +996,8 @@ components:
         $ref: '#/components/schemas/ServiceDefinitionSchemaVersions'
     SearchIssuesIncludeQueryParameter:
       description: Comma-separated list of relationship objects that should be included
-        in the response.
+        in the response. Possible values are `issue`, `issue.assignee`, `issue.case`,
+        and `issue.team_owners`.
       explode: false
       in: query
       name: include

services/error_tracking/src/v2/ErrorTrackingApi.ts

@@ -647,7 +647,7 @@ export interface ErrorTrackingApiGetIssueRequest {
    */
   issueId: string;
   /**
-   * Comma-separated list of relationship objects that should be included in the response.
+   * Comma-separated list of relationship objects that should be included in the response. Possible values are `assignee`, `case`, and `team_owners`.
    * @type Array<GetIssueIncludeQueryParameterItem>
    */
   include?: Array<GetIssueIncludeQueryParameterItem>;
@@ -660,7 +660,7 @@ export interface ErrorTrackingApiSearchIssuesRequest {
    */
   body: IssuesSearchRequest;
   /**
-   * Comma-separated list of relationship objects that should be included in the response.
+   * Comma-separated list of relationship objects that should be included in the response. Possible values are `issue`, `issue.assignee`, `issue.case`, and `issue.team_owners`.
    * @type Array<SearchIssuesIncludeQueryParameterItem>
    */
   include?: Array<SearchIssuesIncludeQueryParameterItem>;