Bump external/benchmark from `761305e` to `4e3f2d8` #1952

Job	Run time
clang-tidy	57s
cmake-lint	29s
cppcheck	58s
code-ql (cpp, gcc-14)	3m 7s
include-what-you-use	44s
Codacy Security Scan	3m 43s
DevSkim	32s
msvc-code-analysis (RelWithDebInfo)	4m 33s
ShellCheck	10s
	15m 13s

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