Syntax issue in `eb_hooks.py`

With `2025.06`, I see
```
/cvmfs/software.eessi.io/versions/2025.06/init/easybuild/eb_hooks.py:957: SyntaxWarning: invalid escape sequence '\$'
  regex = re.compile("-DCURSES_[A-Z]+_LIBRARY=\$EBROOTNCURSES/lib/lib[a-z]+\.a")
```
My AI friend tells me that this should be a raw string.