fix fragment multi section doc

[icaraps]

Fix #117

Test URLs:

• Before: https://main--prisma-cloud-docs-website--hlxsites.hlx.page/prisma/prisma-cloud/en/compute/pcee/admin-guide/welcome/launch?branch=ian-complex-gdoc
• After: https://fragment-multi-section--prisma-cloud-docs-website--hlxsites.hlx.page/prisma/prisma-cloud/en/compute/pcee/admin-guide/welcome/launch?branch=ian-complex-gdoc

[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]]

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/prisma/prisma-cloud/en/compute/pcee/admin-guide/welcome/launch?branch=ian-complex-gdoc