Mounting Hole size mislabeled in CM4S Datasheet

The size of the 2 mounting holes in 3.1 Mechanical section of the [CM4S Datasheet](https://datasheets.raspberrypi.com/cm4s/cm4s-datasheet.pdf) is labeled as M1 when it should be M2. 

<img width="927" height="756" alt="Image" src="https://github.com/user-attachments/assets/583c0b7f-4b5f-43e1-ab94-3c18fa1ecab2" />