Added script to update nghttp2 in future. One can use
```sh
$ ./tools/update-nghttp2.sh 1.47.0
```
It will automatically copy and update the nghttps in deps.
Fixes: https://github.com/nodejs/node/issues/42089
PR-URL: https://github.com/nodejs/node/pull/42127
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Mestery <mestery@protonmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
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