liz4hc.h: fix a comment: LZ4HC_MAX_CLEVEL -> LZ4HC_CLEVEL_MAX
liz4hc.h: fix a comment: LZ4HC_MAX_CLEVEL -> LZ4HC_CLEVEL_MAX

unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso