Improve api version code validation (#1303)

### Describe what your pull request does and which issue you’re targeting
This PR improves the validation of the version code received from the api.
Closes #1287
<br><br>

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Co-authored-by: DrMaxNix <git@drmaxnix.de>
Reviewed-on: https://codeberg.org/gitnex/GitNex/pulls/1303
Reviewed-by: M M Arif <mmarif@noreply.codeberg.org>
Co-authored-by: DrMaxNix <mail@drmaxnix.de>
Co-committed-by: DrMaxNix <mail@drmaxnix.de>

app/src/main/java/org/mian/gitnex/helpers/Version.java

@@ -36,7 +36,7 @@ public class Version {
 			return false;
 		}
 		final Pattern patternValid =
-				Pattern.compile("^[v,V]?(\\d+)+(\\.(\\d+))*([_,\\-,+][\\w,\\d,_,\\-,+]*)?$");
+				Pattern.compile("^[vV]?(\\d+)+(\\.(\\d+))*([_\\-+][\\w\\-+\\.]*)?$");
 		return value.equals("main") || patternValid.matcher(value).find();
 	}