fix changelog formatting

Author: lmiq

CHANGELOG.md

@@ -20,8 +20,8 @@ will just make packmol ignore all CONECT lines. The second will use a non-standa
 lines, in which the atom indices are expected to be separated by spaces. The default is `ignore_conect = .false.`
 and `non_standard_conect = .false.`, such that the CONECT lines are not ignored and the standard PDB
 format is expected. 
-
 - ![INFO][badge-info] add test to pipy distribution.
+
 Version 21.1.4
 --------------
 - ![INFO][badge-info] add test to pipy distribution.