[openssl/web] 288e14: README: Explain the OpenSSL::Query requirements

[Richard Levitte]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/web
  Commit: 288e14028659fc779f7780bc3f9403427a661464
      https://github.com/openssl/web/commit/288e14028659fc779f7780bc3f9403427a661464
  Author: Richard Levitte <levitte at openssl.org>
  Date:   2023-04-14 (Fri, 14 Apr 2023)

  Changed paths:
    M README.md

  Log Message:
  -----------
  README: Explain the OpenSSL::Query requirements

... also, reinstate git.  We do depend on it quite a lot.

Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre at ncp-e.com>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
(Merged from https://github.com/openssl/web/pull/399)