Allow altering data xmlsitemap_output_xsl to use secure version of JQuery

Problem/Motivation

Currently generated sitemap.xml uses jQuery v 1.4.4 which is not secure.
Description of some vulnerabilities can be found here:

• https://www.cybersecurity-help.cz/vdb/SB2019032804
• https://www.cybersecurity-help.cz/vdb/SB2020052520
• https://security.snyk.io/vuln/npm:jquery:20150627

I would suggest adding the ability to alter the $replacements array in xmlsitemap_output_xsl:
https://git.drupalcode.org/project/xmlsitemap/-/blob/7.x-2.x/xmlsitemap.... so that user can
replace the JQuery version with a secure version (for example, the one provided by the jquery_update module).