fix typo

src/main/java/de/tudresden/inf/st/pnml/Main.java

@@ -91,7 +91,7 @@ public class Main {
             parser = new PnmlParser(pmnlNet);
             petriNets.add(parser.getPetriNet());
           } catch (PnmlParseException e) {
-            logger.error("Parsing the Petri net using the PNML framawork failed.", e);
+            logger.error("Parsing the Petri net using the PNML framework failed.", e);
           }
         }