fix changelog typos

Author: timfel

CHANGELOG.md

@@ -6,14 +6,14 @@ language runtime. The main focus is on user-observable behavior of the engine.
 ## Version 19.3.0
 
 * Implement `charmap_build` function
-* Implement `hexversion` to sys module
+* Implement `hexversion` in sys module
 * Implement `_lzma` module
 * Fix printing of Pandas data frames
 * Fix a bug in `bytes.startswith` for tuple arguments
 * Fix destructuring assignments of arbitrary iterators
 * Fix `dict.__contains__` for dictionaries with only `str` keys for subclasses of `str`
 * Support NumPy 1.16.4 and Pandas 0.25.0
-* Support importing java classes using normal Python import syntax when the package is known
+* Support importing Java classes using normal Python import syntax when the package is known
 * Improve performance across many Python benchmarks
 
 ## Version 19.2.0