fix(anta.tests): Adjust revision for show management cvx

[gmuloc]

Description

Test is throwing error when run on a a device not running CVX at all. Looking at the unit tests, it feels the revision for the command should be 3 and not 1 (cf issue comments)

Fixes #953

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have run pre-commit for code linting and typing (pre-commit run)
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes (tox -e testenv)

[codspeed-hq]

CodSpeed Performance Report

Merging #956 will not alter performance

_{Comparing fix/953 (dc5f75d) with main (0c32b83)}

Summary

✅ 8 untouched benchmarks

[carl-baillargeon]

LGTM

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sarunac]

LGTM!