buildRebar3: fix OTP 28 compatibility

𑁱 rebar3 help bare compile
Usage: rebar3 bare compile [-p <paths>] [-s <separator>] [-o <outdir>]

-p, --paths Wildcard paths of ebin directories to add to code path,
separated by a colon
-s, --separator In case of multiple return paths, the separator
character to use to join them.
-o, --outdir Path where build artifacts are located. Defaults to the
current directory.

pkgs/development/beam-modules/build-rebar3.nix

···
 
         buildPhase = ''
           runHook preBuild
-          HOME=. rebar3 bare compile -path ""
+          HOME=. rebar3 bare compile --paths "."
           runHook postBuild
         '';