Fix registration of ESCborFactory

Author: felixbarny

libs/x-content/impl/src/main/java/org/elasticsearch/xcontent/provider/cbor/ESCborFactory.java

@@ -16,6 +16,10 @@
 
 public class ESCborFactory extends CBORFactory {
 
+    public static ESCborFactoryBuilder builder() {
+        return new ESCborFactoryBuilder();
+    }
+
     @Override
     protected CBORParser _createParser(byte[] data, int offset, int len, IOContext ctxt) {
         ByteQuadsCanonicalizer can = _byteSymbolCanonicalizer.makeChildOrPlaceholder(_factoryFeatures);

libs/x-content/impl/src/main/java/org/elasticsearch/xcontent/provider/cbor/ESCborParser.java

@@ -22,6 +22,7 @@
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.Locale;
 
 public class ESCborParser extends CBORParser implements OptimizedTextCapable {
     public ESCborParser(
@@ -126,6 +127,7 @@ private int _decodeExplicitLength(int lowBits) throws IOException {
         }
         throw _constructError(
             String.format(
+                Locale.ROOT,
                 "Invalid 5-bit length indicator for `JsonToken.%s`: 0x%02X; only 0x00-0x17, 0x1F allowed",
                 currentToken(),
                 lowBits