Update README.md

Merge branch 'master' of https://github.com/hyper-carrot/gopcp-errata-list

Add a small erratum in page 323.

Update README.md

fix a spelling mistake in errtata list: STCP -> SCTP.

Add an erratum in figure 6-11 in page 241.

Add an erratum in page 28.

Add an erratum in page 117.

Add An erratum in table 3-4 in page 44.(fix)

Add An erratum in table 3-4 in page 44.

Improve a clause in page 346.

Add 2 errata in page 132.

Add a erratum in page 52.

Add 2 errata in page 391 & 392. They have improved about sample code. (fix1:gofmtted)

Add 2 errata in page 391 & 392. They have improved about sample code.