Update README.md

Author: sdargoeuves

extreme/exos/README.md

@@ -22,4 +22,4 @@ The image will be tagged based on the version in the filename (e.g., `vrnetlab/e
 
 - `EXOS-VM_v32.6.3.126.qcow2`
 - `EXOS-VM_32.7.2.19.qcow2`
-- `EXOS-VM_v33.1.1.31.qcow2` - this image seems to take a long time to boot.
+- `EXOS-VM_v33.1.1.31.qcow2` - this image takes a long time to boot (~10minutes compared to 1 or 2 minutes with the other two images)