Update README.md

[zjcio]

update for current narrative alignment

Describe your changes

Updating readme narrative

Checklist before merging

• If this PR has some consensus breaking changes, I added the corresponding breaking:: labels
  • This will require 2 reviewers to approve the changes
• If this PR requires changes to the docs or specs, a corresponding PR is opened in the namada-docs repo
  • Relevant PR if applies:
• If this PR affects services such as namada-indexer or namada-masp-indexer, a corresponding PR is opened in that repo
  • Relevant PR if applies:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.47%. Comparing base (f84309b) to head (7e4ec45).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4169      +/-   ##
==========================================
- Coverage   74.48%   74.47%   -0.01%     
==========================================
  Files         341      341              
  Lines      107710   107710              
==========================================
- Hits        80223    80221       -2     
- Misses      27487    27489       +2     

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[tzemanovic]

moved into #4148