Add release notes for v0.3.5

Author: mhostetter

README.md

@@ -78,7 +78,7 @@ Import the `galois` package in Python.
 In [1]: import galois
 
 In [2]: galois.__version__
-Out[2]: '0.3.4'
+Out[2]: '0.3.5'
 ```
 
 ### Create a [`FieldArray`](https://mhostetter.github.io/galois/latest/api/galois.FieldArray/) subclass

docs/release-notes/v0.3.md

@@ -232,3 +232,16 @@ tocdepth: 2
 ### Contributors
 
 - Matt Hostetter ([@mhostetter](https://github.com/mhostetter))
+
+## v0.3.5
+
+*Released May 9, 2023*
+
+### Changes
+
+- Added `py.typed` file to indicate to `mypy` and other type checkers that `galois` supports typing. ([#481](https://github.com/mhostetter/galois/pull/481))
+- Fixed bug with multiple, concurrent BCH and/or Reed Solomon decoders. ([#484](https://github.com/mhostetter/galois/pull/484))
+
+### Contributors
+
+- Matt Hostetter ([@mhostetter](https://github.com/mhostetter))