Update skills/xcodebuildmcp/SKILL.md

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: cameroncooke

skills/xcodebuildmcp/SKILL.md

@@ -13,7 +13,7 @@ If a capability is missing, assume your tool list may be hiding tools (search/pr
 
 ### Session defaults
 
-Before you call any other tools, call `session_show_defaults` to show the current defaults, ensure you then fill in the apropiate missing defaults. You may need to call one or more discovery/list tools to obtain the values needed for certain defaults.
+Before you call any other tools, call `session_show_defaults` to show the current defaults, ensure you then fill in the appropriate missing defaults. You may need to call one or more discovery/list tools to obtain the values needed for certain defaults.
 
 - `session_set_defaults`
   - Set the session defaults, should be called at least once to set tool defaults.