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Fix nightly compatibility and prepare 0.28.1 #315

Job	Run time
Validate release request	5s
read Rust version	4s
Build Windows x64 host	5m 2s
Build release bundle	9m 4s
Test default bundle (windows-2025)	5m 10s
Test default bundle (macos-15)	3m 55s
Test default bundle (macos-15-intel)	7m 23s
Build docs archive	8s
Test default bundle (ubuntu-22.04)	3m 34s
Publish GitHub release	0s
Publish versioned docs and update examples	0s
	34m 25s