Downgrade Rust used to build releases #17445

Job	Run time
Rust doc comments	3m 49s
Build C library (ubuntu-latest)	7m 51s
Lint Rust	8m 30s
cargo deny	31s
Build C library (macos-latest)	4m 18s
Check if node constants are up to date	2s
Check provider database	6s
Python lint	17s
Build deltachat-rpc-server (ubuntu-latest)	2m 21s
Rust tests (ubuntu-latest, 1.83.0)	3m 29s
Build deltachat-rpc-server (macos-latest)	2m 13s
Rust tests (windows-latest, 1.83.0)	22m 3s
Build deltachat-rpc-server (windows-latest)	18m 57s
Rust tests (macos-latest, 1.83.0)	5m 12s
Rust tests (ubuntu-latest, 1.77.0)	9m 51s
JSON-RPC Python tests (ubuntu-latest, 3.13)	2m 15s
JSON-RPC Python tests (macos-latest, 3.13)	2m 10s
JSON-RPC Python tests (windows-latest, 3.13)	3m 14s
JSON-RPC Python tests (ubuntu-latest, pypy3.10)	2m 30s
JSON-RPC Python tests (macos-latest, pypy3.10)	2m 38s
JSON-RPC Python tests (ubuntu-latest, 3.7)	1m 37s
CFFI Python tests (ubuntu-latest, 3.13)	4m 36s
CFFI Python tests (macos-latest, 3.13)	4m 39s
CFFI Python tests (ubuntu-latest, pypy3.10)	4m 36s
CFFI Python tests (macos-latest, pypy3.10)	4m 38s
CFFI Python tests (ubuntu-latest, 3.7)	4m 36s
	2h 6m 59s

Provide feedback