Add ‘path’ to Mark Karpov's packages

I'm now a co-maintainer of ‘path’ and I'll be checking and updating version
boundaries of dependencies and stuff, so I'd like to be notified about
issues related to ‘path’.

build-constraints.yaml

@@ -2043,6 +2043,7 @@ packages:
         - flac
         - flac-picture
         - lame
+        - path
 
     # "Thomas Bereknyei <tomberek@gmail.com>":
         # - multiplate # bounds: transformers