[Security] Address vulnerabilities: upgrade cryptography from 42.0.2 to 42.0.4 and specify JWT algorithms to decode.

[gmarciani]

Changes

1. Upgrade cryptography from 42.0.2 to 42.0.4 to address vulnerability https://github.com/aws/aws-parallelcluster-ui/security/dependabot/30
2. Specify JWT algorithms to decode tokens to address vulnerability https://github.com/aws/aws-parallelcluster-ui/security/dependabot/33. We specify the accepted algorithms to be [RS256] as suggested by Amazon Cognito.

How Has This Been Tested?

1. Deployed in personal environment
2. Verified that login/logout works
3. Verified that PCUI is able to list clusters in a region

PR Quality Checklist

• I added tests to new or existing code
• I removed hardcoded strings and used react-i18next library (useTranslation hook and/or Trans component), see an example here
• I made sure no sensitive info gets logged at any time in the codebase (see here) (e.g. no user info or details, no stacktraces, etc.)
• I made sure that any GitHub issue solved by this PR is correctly linked
• I checked that infrastructure/update_infrastructure.sh runs without any error
• I checked that npm run build builds without any error
• I checked that clusters are listed correctly
• I checked that a new cluster can be created (config is produced and dry run passes)
• I checked that login and logout work as expected

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