* Update README.md

Capitalized the G and S in "Getting Started," and moved "guide" to match the section title in the docs.

* Fixed sentence structure. Changed "download" to "grafana.com/get" and changed "get" to "download".

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

*  Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)

* Docs: Replace "datasources" with "data sources" (#19111)