Add displayName search terms to ToC

[sptramer]

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[ghost]

Docs Build status updates of commit 0f2181d:

🕙 Full build: the average full build time is 27 min(s) 29 sec(s), this is based on the last 114 build(s) for this repository.

[ghost]

Docs Build status updates of commit 0f2181d:

✅ Validation status: passed

File	Status	Preview URL	Details
docs-conceptual/azps-2.1.0/toc.yml	✅Succeeded	View (azps-2.1.0)

For more details, please refer to the build report.

Note: If you changed an existing file name or deleted a file, broken links in other files to the deleted or renamed file are listed only in the full build report.

[ghost]

Docs Build status updates of commit 1411809:

🕙 Full build: the average full build time is 27 min(s) 19 sec(s), this is based on the last 115 build(s) for this repository.

[ghost]

Docs Build status updates of commit 1411809:

✅ Validation status: passed

File	Status	Preview URL	Details
docs-conceptual/azps-1.8.0/toc.yml	✅Succeeded	View (azps-1.8.0)
docs-conceptual/azps-2.1.0/toc.yml	✅Succeeded	View (azps-2.1.0)

For more details, please refer to the build report.

Note: If you changed an existing file name or deleted a file, broken links in other files to the deleted or renamed file are listed only in the full build report.