**Proposed UI label changes:

1.

Select a Sample > Select a Stack
 
2.
Select a sample to create your first workspace > Select a stack to create your first workspace

Reason for the proposed changes:

1. All the cards on that page have "stack" in their brief description (with one exception, "Tooling for Apache Camel K", which can still be reworded using "C and C++ Developer Tools stack" as an example). So it makes sense to align both the UI labels for user navigation and for the relevant headings in the docs with the 'stacks' listed on that page.
2. This is my personal impression: to me, the word 'sample' (probably retained from "code sample" in OpenShift) does not communicate (as in-docs product marketing) to docs readers (potential customers or first-time users) the fact that this is a major feature of Che and that this feature is a major benefit for them to use in production. A 'sample' is something to try out, but a 'stack' is something the customer/user is more likely to identify as a selling feature to benefit from as a Che/CRW user and to make their own job easier while using Che/CRW.