dependabot: bump memchr from 2.7.2 to 2.7.4 #1183

Job	Run time
build 1.70.0 on ubuntu-latest	3m 55s
build 1.72.1 on ubuntu-latest	3m 47s
build 1.76.0 on ubuntu-latest	4m 34s
build 1.78.0 on ubuntu-latest	4m 32s
build 1.79.0 on ubuntu-latest	5m 7s
build 1.70.0 on macos-latest	1s
build 1.72.1 on macos-latest	12m 26s
build 1.76.0 on macos-latest	1s
build 1.78.0 on macos-latest	1s
build 1.79.0 on macos-latest	1s
build 1.70.0 on windows-latest	5m 11s
build 1.72.1 on windows-latest	5m 17s
build 1.76.0 on windows-latest	5m 43s
build 1.78.0 on windows-latest	6m 1s
build 1.79.0 on windows-latest	5m 11s
build debug and release, upload	0s
check	0s
bench	0s
clippy	0s
cross ${{ matrix.target }} on ubuntu-22.04	0s
test linux	0s
test Mac OS	0s
codecov validate	0s
doc, publish	0s
flamegraph	0s
markup link checker	0s
test Windows	0s
yamllint	0s
run s4	0s
cross ${{ matrix.target }} on macos-13	0s
llvm-cov	0s
cross ${{ matrix.target }} on windows	0s
	1h 1m 48s

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