Observability landing page title should be "Getting Started | Observability" rather than "Elastic"

[cyrille-leclerc]

Kibana version:

7.9

Elasticsearch version:

7.9

Server OS version:

N/A

Browser version:

N/A

Browser OS version:

N/A

Original install method (e.g. download page, yum, from source, etc.):

N/A

Describe the bug:

The browser tab of the Observability landing page should be "Getting Started | Observability" instead of "Elastic" to match the breadcrumb name (reversing the order).

Steps to reproduce:

Expected behavior:

Screenshots (if relevant):

Errors in browser console (if relevant):

Provide logs and/or server output (if relevant):

Any additional context: