Added release notes

docs/handbook/image-file-formats.rst

@@ -1211,6 +1211,8 @@ The :py:meth:`~PIL.Image.Image.save` method can take the following keyword argum
 **big_tiff**
     If true, the image will be saved as a BigTIFF.
 
+    .. versionadded:: 11.1.0
+
 **compression**
     A string containing the desired compression method for the
     file. (valid only with libtiff installed) Valid compression

docs/releasenotes/11.1.0.rst

@@ -1,25 +1,6 @@
 11.1.0
 ------
 
-Security
-========
-
-TODO
-^^^^
-
-TODO
-
-:cve:`YYYY-XXXXX`: TODO
-^^^^^^^^^^^^^^^^^^^^^^^
-
-TODO
-
-Backwards Incompatible Changes
-==============================
-
-TODO
-^^^^
-
 Deprecations
 ============
 
@@ -66,6 +47,13 @@ zlib library, and what version of zlib-ng is being used::
     features.check_feature("zlib_ng")  # True or False
     features.version_feature("zlib_ng")  # "2.2.2" for example, or None
 
+Saving TIFF as BigTIFF
+^^^^^^^^^^^^^^^^^^^^^^
+
+TIFF images can now be saved as BigTIFF using a ``big_tiff`` argument::
+
+    im.save("out.tiff", big_tiff=True)
+
 Other Changes
 =============