Fix(skill-creator): specify utf-8 encoding when reading SKILL.md

Author: drfccv

skills/skill-creator/scripts/quick_validate.py

@@ -19,7 +19,7 @@ def validate_skill(skill_path):
         return False, "SKILL.md not found"
 
     # Read and validate frontmatter
-    content = skill_md.read_text()
+    content = skill_md.read_text(encoding='utf-8')
     if not content.startswith('---'):
         return False, "No YAML frontmatter found"