Fix capitalization of b.writeUint16LE(0x90ab, 0) in buffer docs #3223
Description
In https://github.com/nodejs/node/blob/master/doc/api/buffer.markdown, b.writeUint16LE(0x90ab, 0); should be b.writeUInt16LE(0x90ab, 0);.
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In https://github.com/nodejs/node/blob/master/doc/api/buffer.markdown, b.writeUint16LE(0x90ab, 0); should be b.writeUInt16LE(0x90ab, 0);.