benchmark: using 1.6.1 instead of 1.7

[lkeegan]

mingw compile error:

[ 91%] Linking CXX static library libbenchmark.a
[ 91%] Built target benchmark
[ 95%] Building CXX object src/CMakeFiles/benchmark_main.dir/benchmark_main.cc.obj
In file included from D:/a/sme_deps_common/sme_deps_common/benchmark/src/benchmark_main.cc:15:
D:/a/sme_deps_common/sme_deps_common/benchmark/include/benchmark/benchmark.h:901:37: error: 'bool benchmark::State::KeepRunningInternal(benchmark::IterationCount, bool)' redeclared without dllimport attribute after being referenced with dll linkage [-Werror]
  901 | inline BENCHMARK_ALWAYS_INLINE bool State::KeepRunningInternal(IterationCount n,
      |                                     ^~~~~
D:/a/sme_deps_common/sme_deps_common/benchmark/include/benchmark/benchmark.h:1547:7: error: 'int main(int, char**)' redeclared without dllimport attribute: previous dllimport ignored [-Werror=attributes]
 1547 |   int main(int argc, char** argv) {                                     \
      |       ^~~~
D:/a/sme_deps_common/sme_deps_common/benchmark/src/benchmark_main.cc:18:1: note: in expansion of macro 'BENCHMARK_MAIN'
   18 | BENCHMARK_MAIN();
      | ^~~~~~~~~~~~~~
cc1plus.exe: all warnings being treated as errors
make[2]: *** [src/CMakeFiles/benchmark_main.dir/build.make:77: src/CMakeFiles/benchmark_main.dir/benchmark_main.cc.obj] Error 1
make[1]: *** [CMakeFiles/Makefile2:126: src/CMakeFiles/benchmark_main.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

[lkeegan]

fixed in 1.7.1