8232713: Update BCEL version to 6.3.1 in license file

Reviewed-by: joehw
diff --git a/src/java.xml/share/legal/bcel.md b/src/java.xml/share/legal/bcel.md
index bb434b0..757c207 100644
--- a/src/java.xml/share/legal/bcel.md
+++ b/src/java.xml/share/legal/bcel.md
@@ -1,4 +1,4 @@
-## Apache Commons Byte Code Engineering Library (BCEL) Version 6.0 
+## Apache Commons Byte Code Engineering Library (BCEL) Version 6.3.1
 
 ### Apache Commons BCEL Notice
 <pre>