Fix bad unordered list in changelog

 - Python Markdown seems to follow slightly different rules than GFM

Author: zbeekman

CHANGELOG.md

@@ -17,6 +17,7 @@
 [Complete Changeset](https://github.com/jacobwilliams/json-fortran/compare/4.1.1...HEAD)
 
 **Enhancements**
+
 - Added FORD documentation automatic deployment via
   [PR \#137](https://github.com/jacobwilliams/json-fortran/pull/137)
   from [zbeekman](https://github.com/zbeekman)
@@ -60,6 +61,7 @@
   from [zbeekman](https://github.com/zbeekman)
 
 **Fixed issues:**
+
 - Fixed bad gcov reports being generated due to a gcov/gfortran bug,
   [\#131](https://github.com/jacobwilliams/json-fortran/issues/131)
   via