Update with notice

[evachen96]

Description

Update readme doc with notices for R4B and CosmosDB end of support

Related issues

Addresses [issue #].

Testing

Describe how this change was tested.

FHIR Team Checklist

• Update the title of the PR to be succinct and less than 65 characters
• Add a milestone to the PR for the sprint that it is merged (i.e. add S47)
• Tag the PR with the type of update: Bug, Build, Dependencies, Enhancement, New-Feature or Documentation
• Tag the PR with Open source, Azure API for FHIR (CosmosDB or common code) or Azure Healthcare APIs (SQL or common code) to specify where this change is intended to be released.
• Tag the PR with Schema Version backward compatible or Schema Version backward incompatible or Schema Version unchanged if this adds or updates Sql script which is/is not backward compatible with the code.
• When changing or adding behavior, if your code modifies the system design or changes design assumptions, please create and include an ADR.
• CI is green before merge
• Review squash-merge requirements

Semver Change (docs)

Patch|Skip|Feature|Breaking (reason)

[EXPEkesheth]

should we state ends on or ends starting. Also -are you referencing to docker image versions?

[evachen96]

Made update!

[EXPEkesheth]

@evachen96 -provided couple of comments, thanks for driving the work !

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (main@97f9b90). Learn more about missing BASE report.

Additional details and impacted files

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  Hits            ?    27348           
  Misses          ?     6867           
  Partials        ?     1328           

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