update changelog

Author: xwings

ChangeLog

@@ -1,16 +1,12 @@
 This file details the changelog of Qiling Framework.
 
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-BREAK CHANGE
-- ql.multithread can be only set during Qiling.__init__ now.
-- ql.nprint and ql.dpring is depreciated. Please use logging directly instead.
-- ql.filename is renamed to ql.argv.
-- ql.output and ql.verbose now has slightly different meanings and can be adjusted runtime. See their docstring for details.
-- Remove ql.log_dir, ql.log_split, ql.append but add ql.log_file instead.
+[Version 1.2.4]: April [SOMETHING], 2021
 
+-
 
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-[Version 1.2.3]: March [SOMETHING], 2021
+[Version 1.2.3]: March 30th, 2021
 
 - Improved PR #689, Android syscall and test fix
 - GDB speed optimization
@@ -21,8 +17,9 @@ BREAK CHANGE
 - Clean and remove rootfs
 - ql.filter now accepts a regular expression
 
+
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-[Version 1.2.2]: February 8, 2021
+[Version 1.2.2]: February 8th, 2021
 
 - Fix _acmdln and _wcmdln handling
 - More UEFI refactor