Replace file_validate_extensions deprecated method to work with Drupal 11

MR!39 ready for a review.

in this patch included in latest version ? am having a problem after enabling Gin_login, first search and dig found it was this issue described here am on 2.1.3 version

The website encountered an unexpected error. Try again later.

Drupal\Component\Plugin\Exception\PluginNotFoundException: The "file_validate_extensions" plugin does not exist. Valid plugin IDs for Drupal\Core\Validation\ConstraintManager are: Callback, Blank, NotBlank, Email, Choice, Image, AddressFormat, Country, CKEditor5Element, CKEditor5MediaAndFilterSettingsInSync, CKEditor5EnabledConfigurablePlugins, CKEditor5FundamentalCompatibility, SourceEditingPreventSelfXssConstraint, SourceEditingRedundantTags, StyleSensibleElement, CKEditor5ToolbarItemConditionsMet, CKEditor5ToolbarItem, CKEditor5ToolbarItemDependencyConstraint, UniqueLabelInList, OrderVersion, PurchasedEntityAvailable, Currency, ProductVariationSku, DateTimeFormat, FileEncoding, FileExtension, FileExtensionSecure, FileImageDimensions, FileIsImage, FileNameLength, FileSizeLimit, FileUriUnique, FileValidation, LinkAccess, LinkExternalProtocols, LinkNotExistingInternal, LinkType, MediaMappingsConstraint, oembed_resource, MenuTreeHierarchy, MenuSettings, PathAlias, State, ProtectedUserField, UserCancelMethod, UserMailRequired, UserMailUnique, UserName, UserNameUnique, ContentTranslationSynchronizedFields, ConfigExists, LangcodeRequiredIfTranslatableValues, RequiredConfigDependencies, Bundle, EntityChanged, EntityHasField, EntityType, EntityUntranslatableFields, ImmutableProperties, ReferenceAccess, ValidReference, ExtensionExists, ExtensionName, UniquePathAlias, ValidPath, PluginExists, AllowedValues, ComplexData, Count, CountryCode, EntityBundleExists, FullyValidatable, Null, Length, NotNull, PrimitiveType, Range, Regex, UniqueField, UriHost, Uuid, ValidKeys in Drupal\Core\Plugin\DefaultPluginManager->doGetDefinition() (line 53 of core/lib/Drupal/Component/Plugin/Discovery/DiscoveryTrait.php). 

is this patch included in latest version ?

No.

Thanks, hope this is not inappropriate, but can you point me where i can go to learn how to patch it manually ?

@noored Look at the code changes:

https://git.drupalcode.org/project/gin_login/-/merge_requests/39/diffs#n...