Enhance PR description validation for flexible category matching

This commit improves the `check_pr_description` function in `validate_pr_description.py` to allow for more flexible matching of changelog categories. The changes enable the use of `startswith` for category validation, accommodating variations in category names and ensuring better compatibility with existing categories.

Key changes:
- Introduced logic to check if the category starts with or is matched by valid categories.
- Enhanced handling of "Not for changelog" categories to improve validation accuracy.
- Updated error messages for clarity in case of invalid categories.

Author: naspirato

.github/actions/validate_pr_description/validate_pr_description.py

@@ -47,18 +47,36 @@ def check_pr_description(description, is_not_for_cl_valid=True) -> Tuple[bool, s
         return False, txt
 
     category = categories[0]
+    category_lower = category.lower()
 
-    if not any(category.lower() == valid_cat.lower() for valid_cat in ALL_CATEGORIES):
+    # Check if category matches any valid category using startswith for flexible matching
+    # This allows both "Not for changelog" and "Not for changelog (changelog entry is not required)"
+    is_valid_category = False
+    is_not_for_changelog = False
+    
+    for valid_cat in ALL_CATEGORIES:
+        valid_cat_lower = valid_cat.lower()
+        # Extract base name (before parentheses) for flexible matching
+        base_name = valid_cat_lower.split('(')[0].strip()
+        
+        # Use startswith for all categories to support variants
+        if category_lower.startswith(base_name) or base_name.startswith(category_lower):
+            is_valid_category = True
+            if valid_cat in NOT_FOR_CHANGELOG_CATEGORIES:
+                is_not_for_changelog = True
+            break
+    
+    if not is_valid_category:
         txt = f"Invalid Changelog category: {category}"
         print(f"::warning::{txt}")
         return False, txt
 
-    if not is_not_for_cl_valid and any(category.lower() == cat.lower() for cat in NOT_FOR_CHANGELOG_CATEGORIES):
+    if not is_not_for_cl_valid and is_not_for_changelog:
         txt = f"Category is not for changelog: {category}"
         print(f"::notice::{txt}")
         return False, txt
 
-    if not any(category.lower() == cat.lower() for cat in NOT_FOR_CHANGELOG_CATEGORIES):
+    if not is_not_for_changelog:
         entry_section = re.search(r"### Changelog entry.*?\n(.*?)(\n###|$)", description, re.DOTALL)
         if not entry_section or len(entry_section.group(1).strip()) < 20:
             txt = "The changelog entry is less than 20 characters or missing."