[stable20] fix parameter provided as string not array

[backportbot-nextcloud]

backport of #25361

[faily-bot]

🤖 beep boop beep 🤖

Here are the logs for the failed build:

Status of 1769: failure

acceptance-app-files-sharing

• tests/acceptance/features/app-files-sharing.feature:23

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 Scenario: share a file with another user that needs to accept shares # /drone/src/tests/acceptance/features/app-files-sharing.feature:23
Given I act as John # ActorContext::iActAs()
And I am logged in as the admin # LoginPageContext::iAmLoggedInAsTheAdmin()
And I act as Jane # ActorContext::iActAs()
And I am logged in # LoginPageContext::iAmLoggedIn()
And I visit the settings page # SettingsMenuContext::iVisitTheSettingsPage()
And I open the "Sharing" section # AppNavigationContext::iOpenTheSection()
And I disable accepting the shares by default # SettingsContext::iDisableAcceptingTheSharesByDefault()
And I see that shares are not accepted by default # SettingsContext::iSeeThatSharesAreNotAcceptedByDefault()
And I act as John # ActorContext::iActAs()
And I rename "welcome.txt" to "farewell.txt" # FileListContext::iRenameTo()
And I see that the file list contains a file named "farewell.txt" # FileListContext::iSeeThatTheFileListContainsAFileNamed()
When I share "farewell.txt" with "user0" # FilesAppSharingContext::iShareWith()
And I see that the file is shared with "user0" # FilesAppSharingContext::iSeeThatTheFileIsSharedWith()
And I act as Jane # ActorContext::iActAs()
And I open the Files app # FilesAppContext::iOpenTheFilesApp()
And I see that the file list does not contain a file named "farewell.txt" # FileListContext::iSeeThatTheFileListDoesNotContainAFileNamed()
And I accept the share for "/farewell.txt" in the notifications # NotificationsContext::iAcceptTheShareForInTheNotifications()
Notifications button in the header could not be found after 100 seconds (NoSuchElementException)
And I open the Files app # FilesAppContext::iOpenTheFilesApp()
Then I see that the file list contains a file named "farewell.txt" # FileListContext::iSeeThatTheFileListContainsAFileNamed()
And I open the details view for "farewell.txt" # FileListContext::iOpenTheDetailsViewFor()
And I see that the details view is open # FilesAppContext::iSeeThatTheDetailsViewIsOpen()
And I open the "Sharing" tab in the details view # FilesAppContext::iOpenTheTabInTheDetailsView()
And I see that the "Sharing" tab in the details view is eventually loaded # FilesAppContext::iSeeThatTheTabInTheDetailsViewIsEventuallyLoaded()
And I see that the file is shared with me by "admin" # FilesAppSharingContext::iSeeThatTheFileIsSharedWithMeBy()