Adapt to new QUDT multiplication sign

Author: fkleedorfer

qudtlib-model/src/main/java/io/github/qudtlib/model/FactorUnits.java

@@ -510,7 +510,7 @@ public Optional<String> getSymbol() {
             if (fu.exponent > 0) {
                 String symbol = fu.unit.getSymbol().orElse(null);
                 if (symbol == null) return Optional.empty();
-                sb.append(symbol).append(getExponentString(fu.exponent)).append("⋅");
+                sb.append(symbol).append(getExponentString(fu.exponent)).append("·");
             } else {
                 hasDenominator = true;
             }
@@ -527,7 +527,7 @@ public Optional<String> getSymbol() {
                     if (symbol == null) return Optional.empty();
                     sbDenom.append(symbol);
                     sbDenom.append(getExponentString(fu.exponent));
-                    sbDenom.append("⋅");
+                    sbDenom.append("·");
                     cnt++;
                 }
             }