manually update nightly version to 2026-06-11. #744

Job	Run time
Check WASM	28s
Cross test	1m 20s
Test 32-bit version	39s
Docs - stable toolchain	1m 26s
Docs - nightly toolchain	2m 9s
Bench - nightly toolchain	1m 48s
Lint - nightly toolchain	1m 41s
Test - nightly toolchain (recent)	1m 34s
Test - stable toolchain (recent)	1m 48s
Test - msrv toolchain (recent)	1m 28s
	14m 21s

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