Update directory name to cover the correct package name

protos/rail_backend/v1/pis_schema.proto

@@ -0,0 +1,16 @@
+syntax = "proto3";
+
+package rail_backend.v1;
+
+message PisReferenceList {
+    repeated PisMapping entries = 1;
+}
+
+message PisMapping {
+    string code = 1;
+    string toc = 2;
+    repeated string crsStops = 3;
+    fixed64 crsHash = 4; // XXH4 Hash for fast lookup of exact match
+    repeated string tiplocStops = 5;
+    fixed64 tiplocHash = 6;
+}