CPP-5191 S6177 improve rule description

[mostafa-mohammed-sonarsource]

Review

A dedicated reviewer checked the rule description successfully for:

• [ ] logical errors and incorrect information
• [ ] information gaps and missing content
• [ ] text style and tone
• [ ] PR summary and labels follow the guidelines

[alejandro-alvarez-sonarsource]

Also, before merging, rename the PR to follow the guidelines. (i.e. Modify rule S6177 ...)

[tomasz-kaminski-sonarsource]

~~I would also like to add a non-switch example mentioned in the ticket. We see many comments in SC feedback when this issue is rejected with a "is not a switch" message.~~

I have missed the example.

[sonarqube-next[bot]]

Quality Gate passed for 'rspec-tools'

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube

[sonarqube-next[bot]]

Quality Gate passed for 'rspec-frontend'

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube