Improve wording in root organization list page

[pavinduLakshan]

Purpose

$subject

Related Issues

• Fix root organization creation description issues product-is#21679

Related PRs

• N/A

Checklist

• e2e cypress tests locally verified. (for internal contributers)
• Manual test round performed and verified.
• UX/UI review done on the final implementation.
• Documentation provided. (Add links if there are any)
• Relevant backend changes deployed and verified
• Unit tests provided. (Add links if there are any)
• Integration tests provided. (Add links if there are any)

Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines
• Ran FindSecurityBugs plugin and verified report
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 41.77%. Comparing base (d47349b) to head (f92d943).
Report is 39 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7534   +/-   ##
=======================================
  Coverage   41.77%   41.77%           
=======================================
  Files          42       42           
  Lines         936      936           
  Branches      214      235   +21     
=======================================
  Hits          391      391           
+ Misses        545      501   -44     
- Partials        0       44   +44     

Flag	Coverage Δ
@wso2is/core	41.77% <ø> (ø)

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see 12 files with indirect coverage changes