Fails to build from source with Java 17 because of illegal escape character

[apoleon]

It looks like the code in

utils-parent/utils/src/main/java/de/fau/cs/osr/utils/XmlGrammar.java

line 41

fails with Java 17 because not all unicode slashes are escaped. If I change the code from

"|[\uD800\\uDC00-\uDB7F\uDFFF]" + // #x10000-#xEFFFF

to

"|[\\uD800\\uDC00-\\uDB7F\\uDFFF]" + // #x10000-#xEFFFF

it works for me