Update msim pointer #80684

Job	Run time
diff	8s
license-check	1m 4s
test-extra (ubuntu-ghcloud)	27m 26s
test (ubuntu-ghcloud)	27m 33s
simtest	15m 21s
windows-build (windows-ghcloud)	12m 2s
clippy	3m 43s
move-test	0s
test-extra	0s
cargo-deny (bans, licenses, sources)	31s
test	0s
cargo-deny (advisories)	38s
rustfmt	20s
cutting a new execution layer	1m 16s
	1h 30m 2s

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