[ASP.NET Core] Fix System.Text.Encodings.Web vulnerability

[vishweshbankwar]

Follow up to #4390 (comment)

There is no version available for Microsoft.AspNetCore.Http.Abstractions with System.Text.Encodings.Web dependency >=4.7.2. That is why adding a direct reference.

Design discussion issue #

Changes

Please provide a brief description of the changes here.

Merge requirement checklist

• CONTRIBUTING guidelines followed (nullable enabled, static analysis, etc.)
• Unit tests added/updated
• Appropriate CHANGELOG.md files updated for non-trivial changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

Merging #4399 (9668c8d) into main (586aa7e) will increase coverage by 0.00%.
The diff coverage is n/a.

❗ Current head 9668c8d differs from pull request most recent head 2cae6a3. Consider uploading reports for the commit 2cae6a3 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4399   +/-   ##
=======================================
  Coverage   84.77%   84.77%           
=======================================
  Files         300      300           
  Lines       12010    12010           
=======================================
+ Hits        10181    10182    +1     
+ Misses       1829     1828    -1     

see 5 files with indirect coverage changes