Merge #12556: [Trivial] fix version typo in getpeerinfo RPC call help

Summary:
d16bfaa fix version typo (Tamas Blummer)

Pull request description:

RPC getpeeerinfo help output uses non-existent protocol version 7001. Changed to 70001.

Tree-SHA512: aea634d739b51bf26e3f871e8bf2bf812eb62a5d87008ead3ed27ec8bd9b753ad0a958eb21f580e505d7f2b36d60e5d9901dc8e0d25f34b7ef9533fddc898844

Backport of Core PR12556
https://github.com/bitcoin/bitcoin/pull/12556

Test Plan:

make check
./bitcoind
./bitcoin-cli help getpeerinfo

Reviewers: deadalnix, Fabien, jasonbcox, O1 Bitcoin ABC, #bitcoin_abc

Reviewed By: jasonbcox, O1 Bitcoin ABC, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D3778