[regex] Bump to 2026.7.19 (#16027) #15694

Job	Run time
stubtest: stdlib (ubuntu-latest, 3.12)	43s
stubtest: stdlib (windows-latest, 3.11)	1m 20s
stubtest: stdlib (ubuntu-latest, 3.10)	35s
stubtest: stdlib (macos-latest, 3.15)	48s
stubtest: stdlib (windows-latest, 3.12)	1m 41s
stubtest: stdlib (ubuntu-latest, 3.15)	44s
stubtest: stdlib (windows-latest, 3.13)	1m 11s
stubtest: stdlib (ubuntu-latest, 3.13)	35s
stubtest: stdlib (macos-latest, 3.12)	51s
stubtest: stdlib (ubuntu-latest, 3.11)	41s
stubtest: stdlib (macos-latest, 3.13)	25s
stubtest: stdlib (ubuntu-latest, 3.14)	42s
stubtest: stdlib (macos-latest, 3.14)	23s
stubtest: stdlib (windows-latest, 3.15)	1m 42s
stubtest: stdlib (macos-latest, 3.11)	34s
stubtest: stdlib (macos-latest, 3.10)	1m 6s
stubtest: stdlib (windows-latest, 3.14)	1m 7s
	15m 8s

Provide feedback