Changes source constant for admin-api (#7)

[Staging](https://preview-mongodbsarahsimpers.gatsbyjs.io/ops-manager/hotfix-34607-3/core/api/)

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Author: sarahsimpers

snooty.toml

@@ -50,7 +50,7 @@ toc_landing_pages = [
 
 [constants]
 aagent = "Automation"
-admin-api = "Admin API"
+admin-api = "Ops Manager Administration API"
 agent-dl-deb-debian-8-x64 = "Debian 8/9, Ubuntu 16.X/18.X - DEB"
 agent-dl-deb-debian-9-x64 = "Debian 8/9, Ubuntu 16.X/18.X - DEB"
 agent-dl-deb-ubuntu-16-x64 = "Debian 8/9, Ubuntu 16.X/18.X - DEB"

source/api.txt

@@ -14,7 +14,7 @@ API
    :titlesonly:
    :hidden:
 
-   Admin API Principles </core/api>
+   {+admin-api+} Principles </core/api>
    /reference/api
    /reference/api-error-codes
    /tutorial/configure-public-api-access