Update setup.py and CHANGELOG.md for 0.3.28 release

Author: davidplowman

CHANGELOG.md

@@ -6,6 +6,18 @@
 
 ### Changed
 
+## 0.3.28 Beta Release 27
+
+### Added
+
+* Support for encrypted rpks for AI cam.
+* Handling for "startup frames" (once committed to libcamera).
+
+### Changed
+
+* Some audio/video bugs fixed, also relating to CircularOutput2.
+* Sensor name is now saved as the "Model" in DNG files (requires latest PiDNG).
+
 ## 0.3.27 Beta Release 26
 
 ### Added

setup.py

@@ -11,7 +11,7 @@
 
 setup(
     name='picamera2',
-    version='0.3.27',
+    version='0.3.28',
     description='The libcamera-based Python interface to Raspberry Pi cameras, based on the original Picamera library',
     long_description=long_description,
     long_description_content_type='text/markdown',