Update README for B10.2 install in Ops

[hbushouse]

This PR updates the DMS Build info table in the jwst README, to coincide with the installation of B10.2.x today in Ops.

Checklist for PR authors (skip items if you don't have permissions or they are not applicable)

• added entry in CHANGES.rst within the relevant release section
• updated or added relevant tests
• updated relevant documentation
• added relevant milestone
• added relevant label(s)
• ran regression tests, post a link to the Jenkins job below.
  How to run regression tests on a PR
• All comments are resolved
• Make sure the JIRA ticket is resolved properly

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.52%. Comparing base (b7e0b10) to head (eba9de1).
Report is 334 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8556      +/-   ##
==========================================
+ Coverage   58.02%   58.52%   +0.50%     
==========================================
  Files         388      388              
  Lines       38977    38957      -20     
==========================================
+ Hits        22617    22801     +184     
+ Misses      16360    16156     -204     

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