fix: usage of direct logging (#2884)

fix usage of logging

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

Author: dolfim-ibm

docling/backend/xml/uspto_backend.py

@@ -630,7 +630,7 @@ def skippedEntity(self, name):
                     escaped = self.style_html.get_greek_from_iso8879(f"&{name};")
                     unescaped = html.unescape(escaped)
                     if unescaped == escaped:
-                        logging.debug("Unrecognized HTML entity: " + name)
+                        _log.debug("Unrecognized HTML entity: " + name)
                         return
 
                     if element in (
@@ -1191,7 +1191,7 @@ def skippedEntity(self, name):
                     escaped = self.style_html.get_greek_from_iso8879(f"&{name};")
                     unescaped = html.unescape(escaped)
                     if unescaped == escaped:
-                        logging.debug("Unrecognized HTML entity: " + name)
+                        _log.debug("Unrecognized HTML entity: " + name)
                         return
 
                     if element in (