Fix regression with connection upgrade (#7879) #1804

Job	Run time
Generate llhttp sources	6s
Linter	1m 10s
Test (3.8, ubuntu, false)	5m 44s
Test (3.8, windows, false)	4m 52s
Test (3.8, Y, ubuntu, false)	4m 20s
Test (3.9, ubuntu, false)	4m 47s
Test (3.9, macos, false)	7m 24s
Test (3.9, windows, false)	5m 2s
Test (3.9, Y, ubuntu, false)	4m 14s
Test (3.10, ubuntu, false)	5m 3s
Test (3.10, macos, false)	6m 40s
Test (3.10, windows, false)	5m 37s
Test (3.10, Y, ubuntu, false)	4m 25s
Test (pypy-3.9, Y, ubuntu, false)	10m 12s
Test (macos, 3.11, true, Y)	5m 5s
Test (ubuntu, 3.11, false, Y)	4m 34s
Test (windows, 3.11, true, Y)	15m 22s
Test (ubuntu, 3.12, true, Y)	4m 51s
Test (macos, 3.12, true, Y)	9m 56s
Test (windows, 3.12, true, Y)	16m 52s
check	3s
Pre-Deploy	0s
Tarball	0s
Build wheels on ${{ matrix.os }} ${{ matrix.qemu }}	0s
Deploy	0s
	2h 6m 19s

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