Update dependencies

[craigk5n]

Update versions of bootstrap, bootstrap-icons, phpmailer

[github-actions]

The code patch appears to be updating the version numbers of some dependencies in the require section of a JSON file. Here are a few things to note:

• The update from phpmailer/phpmailer version ^6.5 to version 6.5.4 is a specific version number, instead of the more general version range specified by the ^ symbol. This could potentially cause compatibility issues if there are breaking changes between versions.
• The updates to twbs/bootstrap and twbs/bootstrap-icons appear to be for minor version releases, which usually indicates bug fixes or small improvements without introducing major new features.
• The "license" field specifies the GPL-2.0-only license.

Without access to the rest of the codebase, it is difficult to make more specific bug risk or improvement suggestions. However, it's generally good practice to keep dependencies updated to minimize security vulnerabilities and compatibility issues with other libraries.

[github-actions]

The code patch seems to be a simple update to the URLs and integrity hashes for the Bootstrap CSS and JS files. There does not appear to be any bug risk or issues with the code. Some minor improvement suggestions could be:

• Consider adding version numbers to the file names in the URLs for better cache control.
• It might be a good practice to keep track of the changes made to this auto-generated file in a changelog, especially if other contributors or maintainers might need to review it later.