docs: Update ChangeLog for 12.3.1
diff --git a/ChangeLog b/ChangeLog
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@@ -1,3 +1,18 @@
+2026-05-24 Mintsuki <mintsuki@protonmail.com>
+
+ *** Release 12.3.1 ***
+
+ Noteworthy changes compared to the previous release, 12.3.0:
+
+ Bug fixes:
+ - Fix x86(_64) Linux protocol loader miscompliance that could cause
+ boot failures on some setups showing an "invalid magic at start of
+ compressed archive" error.
+
+ Miscellaneous:
+ - Shrink the size of `limine-uefi-cd.bin` to avoid wasting space when
+ unnecessary.
+
2026-05-18 Mintsuki <mintsuki@protonmail.com>
*** Release 12.3.0 ***
