Update gzip for py312 (#10634)

stdlib/gzip.pyi

@@ -139,8 +139,10 @@ class GzipFile(_compression.BaseStream):
         fileobj: _ReadableFileobj | _WritableFileobj | None = None,
         mtime: float | None = None,
     ) -> None: ...
-    @property
-    def filename(self) -> str: ...
+    if sys.version_info < (3, 12):
+        @property
+        def filename(self) -> str: ...
+
     @property
     def mtime(self) -> int | None: ...
     crc: int