uncore frequency metric is incorrect

**Describe The Bug**
On some systems, e.g., Sapphire Rapids, we are seeing uncore frequency up to 7 GHz. This is not possible and definitely incorrect.

**Steps To Reproduce**
./perfspect metrics

**Perfspect Version**
Paste copy/paste the output from `perfspect --version`
3.12

**Platform Information**
EC2 m7i.24 metal

