2.4.1: Improved reported memsize of RE2::MatchData

Changed

• Improve the reported consuming memory size of RE2::MatchData objects. Thanks to @byroot again for suggesting a better way to calculate this.

---

SHA256 checksums:

9465a8182ac88906b54a06aa0c52e4d90be5402f79835c6ae70c997d9792c1fd  re2-2.4.1-aarch64-linux.gem
2a5bf5cb7179d4225ce67d8d765db8ecaf5273cde43de30859f0ea1aebc57cb2  re2-2.4.1-arm-linux.gem
ee67ba3dca9e7020c2dce33cf276995f9d19ced31e44d0907dbdaca437207231  re2-2.4.1-arm64-darwin.gem
33cef5a584503761d31239db0a11016dcf1ba4e476f7021e6191d73b38032b52  re2-2.4.1-x64-mingw-ucrt.gem
5d46f90c8ac320b9c144175a53778d497700fc86aa8c1390a936b48c39010fdf  re2-2.4.1-x64-mingw32.gem
4f29f01f335bec1613b20a050c5f12a3427cb7cfc963a5aa2641c3d2eff7d70b  re2-2.4.1-x86-linux.gem
ce98b1b4abc6140802a9f3c4fe9962218f7ed92af8fc31ef19286c575682d73a  re2-2.4.1-x86-mingw32.gem
2c8bdf58011c26efe41e9b4498c4e65ffee4a461bd5e3400ca0b778079291d0f  re2-2.4.1-x86_64-darwin.gem
3e74b73388332b74afb91330d27f555d0b722c8eecc0f20046f44e7e217e370e  re2-2.4.1-x86_64-linux.gem
e58552cb02f140419af2cfcce6fc0b713a33e248b35d09b1c65524ca1d28aa62  re2-2.4.1.gem