ExtensionFailed: Extension 'bot.exts.core.source' raised an error: TypeError: can only concatenate tuple (not "lis...
Sentry Issue: [SIR-LANCEBOT-7Z](https://sentry.io/organizations/python-discord/issues/3031672910/?referrer=github_integration)

```
TypeError: can only concatenate tuple (not "list") to tuple
  File "discord/ext/commands/bot.py", line 660, in _load_from_module_spec
    spec.loader.exec_module(lib)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 850, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "bot/exts/core/source.py", line 14, in <module>
    class BotSource(commands.Cog):
  File "bot/exts/core/source.py", line 18, in BotSource
    @whitelist_override(channels=WHITELISTED_CHANNELS+[Channels.community_meta, Channels.dev_contrib])

ExtensionFailed: Extension 'bot.exts.core.source' raised an error: TypeError: can only concatenate tuple (not "list") to tuple
  File "runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "__main__.py", line 13, in <module>
    bot.load_extension(ext)
  File "discord/ext/commands/bot.py", line 732, in load_extension
    self._load_from_module_spec(spec, name)
  File "discord/ext/commands/bot.py", line 663, in _load_from_module_spec
    raise errors.ExtensionFailed(key, e) from e
```
diff --git a/bot/exts/core/source.py b/bot/exts/core/source.py
index e9568933..2801be0f 100644
--- a/bot/exts/core/source.py
+++ b/bot/exts/core/source.py
@@ -15,7 +15,7 @@ class BotSource(commands.Cog):
     """Displays information about the bot's source code."""
 
     @commands.command(name="source", aliases=("src",))
-    @whitelist_override(channels=WHITELISTED_CHANNELS+[Channels.community_meta, Channels.dev_contrib])
+    @whitelist_override(channels=WHITELISTED_CHANNELS+(Channels.community_meta, Channels.dev_contrib))
     async def source_command(self, ctx: commands.Context, *, source_item: SourceConverter = None) -> None:
         """Display information and a GitHub link to the source code of a command, tag, or cog."""
         if not source_item:
['bot/exts/core/source.py']