fix: address code review feedback on spelling

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

app/utils/classification_rules.py

@@ -31,7 +31,7 @@ logger = logging.getLogger(__name__)
 # Pre-built categories
 # ---------------------------------------------------------------------------
 
-#: Canonical category names recognised by the system.  Users may also define
+#: Canonical category names recognized by the system.  Users may also define
 #: their own categories via custom rules.
 BUILTIN_CATEGORIES: dict[str, str] = {
     "invoice": "Invoice",

tests/test_classification_rules.py

@@ -104,7 +104,7 @@ class TestFilenamePatternMatching:
         result = classify_document(filename="Payment_Receipt.pdf")
         assert result.category == "receipt"
 
-    def test_unrecognised_filename(self):
+    def test_unrecognized_filename(self):
         """A generic filename with no keywords should return 'unknown'."""
         result = classify_document(filename="document_12345.pdf")
         assert result.category == "unknown"