[html] Reflect parser backports

Backports for PR python/cpython#135310 were merged including 3.12 branch

Author: donbarbos

stdlib/html/parser.pyi

@@ -7,7 +7,7 @@ __all__ = ["HTMLParser"]
 
 class HTMLParser(ParserBase):
     CDATA_CONTENT_ELEMENTS: Final[tuple[str, ...]]
-    if sys.version_info >= (3, 14):
+    if sys.version_info >= (3, 12):
         RCDATA_CONTENT_ELEMENTS: Final[tuple[str, ...]]
 
     def __init__(self, *, convert_charrefs: bool = True) -> None: ...
@@ -31,7 +31,7 @@ class HTMLParser(ParserBase):
     def parse_html_declaration(self, i: int) -> int: ...  # undocumented
     def parse_pi(self, i: int) -> int: ...  # undocumented
     def parse_starttag(self, i: int) -> int: ...  # undocumented
-    if sys.version_info >= (3, 14):
+    if sys.version_info >= (3, 12):
         def set_cdata_mode(self, elem: str, *, escapable: bool = False) -> None: ...  # undocumented
     else:
         def set_cdata_mode(self, elem: str) -> None: ...  # undocumented