WSRF-1310: SEO: Add canonical links as experiment

[uqe]

Ticket: WSRF-1310

Changes:

• Added canonical links for 2 plugin pages as experiment

Pre-checks:

• [ ] Branch prefixed with feature/6/ or hotfix/6/
• [ ] Changelog entry added
• [ ] modules/ROOT/nav.adoc has been updated (if applicable)
• [ ] Files has been included where required (if applicable)
• [ ] Files removed have been deleted, not just excluded from the build (if applicable)
• [ ] (New product features only) Release Note added

Review:

• [ ] Documentation Team Lead has reviewed