updated changelog, ready for release

CHANGELOG.markdown

@@ -1,5 +1,13 @@
 # Change Log
 
+## [0.8.1] - 2021-12-24
+
+Merry Christmas Eve, here's an `imgui-rs` patch.
+
+- FIXES: various memory safety issues around `input_text` and `input_text_multiline`. We are primarily releasing this patch to fix this issue.
+- FIXES: docs are now generated for our feature branches on crates.io. Thanks @Jasper-Bekkers
+- ADD: adds winit-0.26 support. thanks @cwfitzgerald
+
 ## [0.8.0] - 2021-09-17
 
 Welcome to the `0.8.0` update. This is one of the largest updates imgui-rs has ever seen; it will generate errors in a `0.7` project, but hopefully it should be both quick to fix, and enjoyable to update. See our [release page](https://github.com/imgui-rs/imgui-rs/releases/tag/v0.8.0) for more information and a list of contributors to this cycle. Thank you to everyone who uses `imgui-rs`, files issues, and spend their time and effort to PR new changes into the codebase. Because of all that effort, this is by far the best `imgui-rs` has looked!