Fix changelog for 3.12 (#813) #2185

Job	Run time
Rustfmt (stable)	17s
clippy_check (ubuntu-latest, stable)	23s
Build and Test (ubuntu-latest, 1.70)	2m 30s
clippy_check (ubuntu-latest, nightly)	27s
Build and Test (ubuntu-latest, 1.75)	2m 1s
clippy_check (windows-latest, stable)	1m 25s
Build and Test (ubuntu-latest, 1.80)	1m 55s
clippy_check (windows-latest, nightly)	57s
Build and Test (ubuntu-latest, stable)	4m 20s
Build and Test (ubuntu-latest, beta)	1m 49s
Build and Test (ubuntu-latest, nightly)	47s
Build and Test (windows-latest, 1.70)	2m 59s
Build and Test (windows-latest, 1.75)	3m 15s
Build and Test (windows-latest, 1.80)	3m 46s
Build and Test (windows-latest, stable)	3m 47s
Build and Test (windows-latest, beta)	3m 11s
Build and Test (windows-latest, nightly)	1m 47s
Tests result	1s
	35m 37s

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