docs: Update ChangeLog and README.md for 11.4.0
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+2026-04-19 Mintsuki <mintsuki@protonmail.com>
+
+ *** Release 11.4.0 ***
+
+ Noteworthy changes compared to the previous release, 11.3.1:
+
+ New features:
+ - Revamped BIOS early-stage decompressor, replacing gzip (tinf) with a
+ simpler, smaller, faster, and more auditable compressor/decompressor
+ using a fixed-width LZ77 encoding purpose-tailored for x86 code mixed
+ with data by Kamila Szewczyk.
+ - Implement timeout and entry control of the Boot Loader Interface
+ (BLI).
+ - Make `graphics: no` functional on UEFI ports as well.
+
+ Bug fixes:
+ - Revert the "Call Apple set_os protocol on UEFI" change from 11.3.1 as
+ that seems to have been causing issues relating to input devices on
+ certain other Apple systems, pending investigation and usefulness
+ assessment.
+ - Many assorted bug fixes and improvements.
+
2026-04-09 Mintsuki <mintsuki@protonmail.com>
*** Release 11.3.1 ***
