Release 4.2.1 of Microsoft plugins for Moodle 4.2

Release 4.2.1 of Microsoft plugins for Moodle 4.2

Major feature in this release is:

• Support Microsoft user UPN changes. #1156 (Thanks to @PetriAsi for initial work)

Features, bug fixes and small changes in this release include:

• Support samaccountname in field mapping. #2212
• Fix theme_boosto365teams not applied issue in Teams mobile apps for iOS and Android. #2078
• Use "sub" instead of "oid" claim for "objectId" field in non-Azure IdP. #2295 (Thanks to @Tchekda)
• Fix a performance issue on getting users with duplicate email address. #2274, #2323 (Thanks to @sumaiyamannan, @jwcatau)
• Ensure "Secure cookies only" setting is enabled when checking Teams integration settings. #2265
• Update check on file mime type when uploading user matching files. #2282