www/jericho-html: fix encoding to build with jdk21
StreamEncodingDetector.java:239: error: unmappable character (0xC4) for encoding UTF-8
if (b2==0x5A && b3==0xC4 && b4==0xD6) return setEncoding(EBCDIC,"default EBCDIC encoding (<!DOCTYPE...> detected)",0,false); // first four bytes are "<!DO" in EBCDIC ("LZ??" in Windows-1252)PR: 291668