DOC: CHANGELOG MM/DD/YY

* I merged MDAnalysisgh-4361 a bit early, so I should clean up the mess;
I think this fixes the two cases where the datetime string was
not formatted to match our documented convention

[skip cirrus]

package/CHANGELOG

@@ -80,7 +80,7 @@ Deprecations
     PR #3735)
 
 
-28/08/23 IAlibay, hmacdope, pillose, jaclark5, tylerjereddy
+08/28/23 IAlibay, hmacdope, pillose, jaclark5, tylerjereddy
 
  * 2.6.1
 
@@ -103,7 +103,7 @@ Changes
 Deprecations
 
 
-15/08/23 IAlibay, jaclark5, MohitKumar020291, orionarcher, xhgchen,
+08/15/23 IAlibay, jaclark5, MohitKumar020291, orionarcher, xhgchen,
          ztimol, orbeckst
 
  * 2.6.0