SONAR-21908 Update mention from LTS to LTA

[leo-geoffroy-sonarsource]

Please be aware that we are not actively looking for feature contributions. We typically accept minor improvements and bug-fixes. Please ensure your pull request adheres to the following guidelines:

• [ ] explain your motives to contribute this change: what problem you are trying to fix, what improvement you are trying to make
• [ ] If the PR modifies or adds images, use the run-tests.sh imagedir command to verify the image works
• [ ] If the PR modifies or adds images, try to make sure the images run correctly on Linux

[sonarqube-next[bot]]

Quality Gate passed

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