Ruby regex, match contents of certain HTML tag [duplicate]

Consider the following HTML snippet:

[arbitrary content]<script type="text/javascript">    window.__PRELOADED_STATE__ = {"locale": "fr-FR","env": "production"    };</script><script type="text/javascript">    window.dataLayer = [{"event": "data-layer-loaded",        [...]    }];</script>[more arbitrary content]

I'm trying to isolate specifically the hash defined as window.__PRELOADED_STATE__, i.e. the following content:

{"locale": "fr-FR","env": "production"}

For some reason, the following pattern does not seem to get a match:

/<script type="text\/javascript">window.__PRELOADED_STATE__ = (.*?);<\/script>/

(in this case the result would be in group 1, but regex groups are not a requirement)

Does anybody have a better suggestion? For what it's worth, the above is intended for a vanilla ruby 3.3 context (not rails). Besides, the source content contains dozens of scripts, so matching any script would not be sufficient.

Any input would be most welcome!