chore(zowex): bump rust-version to 1.88

[zowe-robot]

Automated update of the minimum Rust version declared in zowex/Cargo.toml,
to match the highest rust-version declared anywhere in the resolved
dependency tree (direct or transitive).

• Previous: 1.85.0
• New: 1.88

[github-actions]

📅 Suggested merge-by date: 9/21/2026

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.16%. Comparing base (023fa2a) to head (9839397).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2886   +/-   ##
=======================================
  Coverage   92.16%   92.16%           
=======================================
  Files         657      657           
  Lines       20572    20572           
  Branches     4684     4685    +1     
=======================================
  Hits        18961    18961           
  Misses       1607     1607           
  Partials        4        4           

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[github-actions]

Client artifacts:

• CLI: https://github.com/zowe/zowe-cli/actions/runs/34092065643/artifacts/10007577831

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud