fix: 🐛 Union type cannot be used in ctx. (#2611)

* 🐛 Union type cannot be used in `ctx`.

* 📝 CHANGELOG.md

CHANGELOG.md

@@ -48,6 +48,8 @@ These changes are available on the `master` branch, but have not yet been releas
   ([#2595](https://github.com/Pycord-Development/pycord/pull/2595))
 - Fixed `BucketType.category` cooldown commands not functioning correctly in private
   channels. ([#2603](https://github.com/Pycord-Development/pycord/pull/2603))
+- Fixed `SlashCommand`'s `ctx` parameter couldn't be `Union` type.
+  ([#2611](https://github.com/Pycord-Development/pycord/pull/2611))
 
 ### Changed
 

discord/commands/options.py

@@ -45,6 +45,7 @@
 from ..utils import MISSING, basic_autocomplete
 
 if TYPE_CHECKING:
+    from ..commands import ApplicationContext
     from ..ext.commands import Converter
     from ..member import Member
     from ..message import Attachment
@@ -227,6 +228,13 @@ def __init__(
         else:
             from ..ext.commands import Converter
 
+            if isinstance(input_type, tuple) and any(
+                issubclass(op, ApplicationContext) for op in input_type
+            ):
+                input_type = next(
+                    op for op in input_type if issubclass(op, ApplicationContext)
+                )
+
             if (
                 isinstance(input_type, Converter)
                 or input_type_is_class