tests: lib: cmis_dsp matrix_unary_f64 requires more than 64KB of RAM

Increase the min ram configuration when running
libraries.cmsis_dsp.matrix.unary_f64 testcase
This should have been included in #51883 but was skipped for some reason.

Signed-off-by: Patryk Kuniecki <patryk.kuniecki@intel.com>