docs: Update ChangeLog for 6.20231226.0
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+2023-12-26 mintsuki <mintsuki@protonmail.com>
+
+ *** Release 6.20231226.0 ***
+
+ Noteworthy changes compared to the previous release, 6.20231216.0:
+
+ New features:
+ - Ignore trailing whitespace in Limine config file.
+
+ Miscellaneous:
+ - Regenerate build system with GNU Autoconf 2.72.
+ - Minor build system adjustments.
+
2023-12-16 mintsuki <mintsuki@protonmail.com>
*** Release 6.20231216.0 ***
