Explicitly set the GitHub Actions thumbprint in the release CDK stack

[dlvenable]

Description

Use the GitHub thumbprint as specified here: https://github.blog/changelog/2022-01-13-github-actions-update-on-oidc-based-deployments-to-aws/

Also updated the AWS CDK to the latest version.

Issues Resolved

Resolves #2343

Check List

• New functionality includes testing.
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed with a real name per the DCO

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
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[codecov-commenter]

Codecov Report

Merging #2345 (6f84f08) into main (062ae95) will increase coverage by 0.05%.
The diff coverage is n/a.

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@@             Coverage Diff              @@
##               main    #2345      +/-   ##
============================================
+ Coverage     93.81%   93.87%   +0.05%     
- Complexity     1978     1979       +1     
============================================
  Files           229      229              
  Lines          5501     5501              
  Branches        443      443              
============================================
+ Hits           5161     5164       +3     
+ Misses          230      228       -2     
+ Partials        110      109       -1     

Impacted Files	Coverage Δ
...opensearch/dataprepper/pipeline/ProcessWorker.java	90.38% <0.00%> (+1.92%)	⬆️
...rwarder/discovery/AwsCloudMapPeerListProvider.java	95.23% <0.00%> (+2.38%)	⬆️

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