Contributor API docs update (#38517)

<!-- Add the related story/sub-task/bug number, like Resolves #123, or
remove if NA -->
**Related issue:** Resolves #37264 
Adds a fleet maintained app example with the new `slug` field in the
response for `/software/batch/:request_uuid` from #38497
See the PR above for an explanation on why this was added.

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Co-authored-by: Marko Lisica <83164494+marko-lisica@users.noreply.github.com>

cmd/fleetctl/integrationtest/gitops/gitops_enterprise_integration_test.go

@@ -2516,7 +2516,6 @@ team_settings:
 	noTeamTitles, _, _, err := s.DS.ListSoftwareTitles(ctx, fleet.SoftwareTitleListOptions{AvailableForInstall: true, TeamID: ptr.Uint(0)},
 		fleet.TeamFilter{User: test.UserAdmin})
 	require.NoError(t, err)
-	fmt.Println("noTeamTitles: ", noTeamTitles)
 	require.Len(t, noTeamTitles, 2)
 	require.NotNil(t, noTeamTitles[0].SoftwarePackage)
 	require.NotNil(t, noTeamTitles[1].SoftwarePackage)