various fixes

[maxakuru]

• redirect to unversioned topic on 404, should exclude not-applicable
• single child link fix in sidenav, should use the child's href not the parent's

Fix #90

Test URLs:

• Before: https://main--prisma-cloud-docs-website--hlxsites.hlx.page/prisma/prisma-cloud/en/compute/public-sector/release-findings/release-findings
• After: https://maxed-fixes--prisma-cloud-docs-website--hlxsites.hlx.page/prisma/prisma-cloud/en/compute/public-sector/release-findings/release-findings

[aem-code-sync[bot]]

Hello, I'm Franklin Bot and I will run some test suites that validate the page speed. In case there are problems, just click the checkbox below to rerun the respective action.

• [ ] Re-run PSI Checks

[aem-code-sync[bot]]

Page	Scores	Audits	Google
/prisma/prisma-cloud/en/compute/public-sector/release-findings/release-findings