[web] Fixes the emscripten CI build by allowing curl redirects

Summary:
Our emscripten builds are failing as curl https://www.openssl.org/source/openssl-3.2.0.tar.gz --output openssl-file results in an empty file.

The link seems to redirect to the proper .tar.gz openssl archive file, so we need to allow curl to redirect with the -L flag

Test Plan: ran the script and succeeeds without invalid archive error message

Reviewers: varun, marcin, inka, tomek

Reviewed By: varun

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D12883