[CVE-2020-11022] Update jQuery to 3.5.0

[miovd]

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What kind of change does this PR introduce?
Vulnerability fix https://github.com/powsybl/powsybl.github.io/security/dependabot/1
[CVE-2020-11022] Potential XSS vulnerability in jQuery

[olperr1]

This PR is ineffective: it only change a comment!

Each component of assets/vendor should be examined since it can be incompatible with the new JQuery version.
For instance, the site uses "bootstrap v4.4.1" and I don't think it is compatible (see the v4.4 and v4.5 documentations).

[So-Fras]

Regarding the components present in assets/vendor, I have found the following latest versions:

• aos --> update to 2.3.4
• bootstrap --> update to 5.3.3
• boxicons --> update to 2.1.4 ?
• counterup --> update to 2.8.0
• fontawesome --> (6.5.1)
• icofont (1.0.1, already up-to-date)
• isotope (3.0.6, already up-to-date)
• jQuery --> update to 3.7.1 (latest version)
• jQuery.easing --> update to 1.13.2
• owl-carousel (2.3.4, already up-to-date)
• php email form --> is it php emailer ? If yes, update to 6.9.1
• remixicon --> update to 4.2.0
• venobox --> update to 2.1.3
• waypoints (4.0.1, already up-to-date)

What do you think?