fix: rebuild protobuf code and update ffi callsite (#4685)

### Description

Not quite sure how this got in, but I think the generated Go protobuf
code got out of sync.
This PR is the result of `make turborepo-ffi-proto` on main and then
fixing the build error caused by trying to construct `ChangedFilesReq`
with a `*string` instead of a `string` in the `ToCommit` field

### Testing Instructions

<!--
  Give a quick description of steps to test your changes.
-->

cli/internal/ffi/ffi.go

@@ -118,12 +118,11 @@ func stringToRef(s string) *string {
 // ChangedFiles returns the files changed in between two commits, the workdir and the index, and optionally untracked files
 func ChangedFiles(gitRoot string, turboRoot string, fromCommit string, toCommit string) ([]string, error) {
 	fromCommitRef := stringToRef(fromCommit)
-	toCommitRef := stringToRef(toCommit)
 
 	req := ffi_proto.ChangedFilesReq{
 		GitRoot:    gitRoot,
 		FromCommit: fromCommitRef,
-		ToCommit:   toCommitRef,
+		ToCommit:   toCommit,
 		TurboRoot:  turboRoot,
 	}