Fix labours.py

Signed-off-by: Vadim Markovtsev <vadim@sourced.tech>

labours.py

@@ -227,9 +227,10 @@ class YamlReader(Reader):
 class ProtobufReader(Reader):
     def read(self, file):
         try:
-            from pb.pb_pb2 import AnalysisResults
+            from internal.pb.pb_pb2 import AnalysisResults
         except ImportError as e:
-            print("\n\n>>> You need to generate pb/pb_pb2.py - run \"make\"\n", file=sys.stderr)
+            print("\n\n>>> You need to generate internal/pb/pb_pb2.py - run \"make\"\n",
+                  file=sys.stderr)
             raise e from None
         self.data = AnalysisResults()
         if file != "-":