Build 2612.1 was released for PC on Tuesday, April 26th, 2022. This was an out-of-band update (similar to 2215 and 2245), not tied to a particular DLC or other content update, however it did add a new DLC and patchday pack.
Official changelog
Not posted yet at the time of this writing. [correct this?]
Technical changelog
Note that this changelog is inherently incomplete.
- Native commands were not reseeded, this uses the same native command list from 2545.
- Backported from Gen9: .#scversion was increased by one to [version here]. This adds a new ‘bit test’ opcode, replacing the oldIS_BIT_SETnative command, which is removed.
- 
update.rpfwas split intoupdate.rpfandupdate2.rpf. The second pack file includes data that is tightly coupled with code, such asscript*.rpf, andcommon:/data/shaders/, likely split to simplify delta updates.
- Added a new DLC content pack ([name] and [patchday name]) containing mostly stub content (including, curiously, a file named stubindlc_...:/common/data/) for the content released with the Gen9 game builds.
- Additional mitigation for an ‘invite spam’ presence exploit.
- Increased the maximum amount of streaming dependencies by 20, matching a similar increase in DLC shop metadata allowed per ped model.