Build custom collector: refer to latest vers of collector

[chalin]

• Closes Building a custom collector refers to old collector version #2262
• Contributes to Create and use a config/section parameter for release versions for each language + collector #1194
• Uses collectorVersion param instead of a hard-coded value

Preview: https://deploy-preview-2263--opentelemetry.netlify.app/docs/collector/custom-collector/

/cc @svrnm

[mx-psi]

LGTM, how is collectorVersion updated?

[chalin]

LGTM, how is collectorVersion updated?

Thanks for the review and approval @mx-psi. The version is updated via a script, which reminds me, I need to update the script. Thanks for the reminder!

[chalin]

For the record, I'll track the update via:

• Make collectorVersion available to entire Collector section #2259

[mx-psi]

Thanks for the details, that makes sense :)