Fix broken link to Elasticsearch "heap size" docs

[kilfoyle]

Hi @sebgl, May I ask you to review this PR for me, or point me in the right direction? This fixes a link in the K8s docs that will break once we merge other changes for the stack 7.10 release, so this will allow the docs build to pass ( elastic/docs#1994 ).

Also, I'll need to backport this to releases 0.9, 1.0-beta, 1.0, 1.1, and 1.2. Can you let me know if I've got the right labels for that? If so, I assume I just create the backports manually, right?

Sorry for the all the questions. Arianna is out this week and I'm a new visitor to this repo. :-)

[kellyemurphy]

LGTM

Looks like there is a tool to generate backports that this repo uses.

[kilfoyle]

Thanks @kellyemurphy! Looks like I'm not authorized to merge in this repo. :-(

[sebgl]

I guess {ref} here actually points to the Elasticsearch reference url base path?

[kilfoyle]

Yes, exactly.

[sebgl]

Looks great, thanks!

[sebgl]

Also, I'll need to backport this to releases 0.9, 1.0-beta, 1.0, 1.1, and 1.2. Can you let me know if I've got the right labels for that? If so, I assume I just create the backports manually, right?

What we usually do is set a label for the smallest version (here that would be 0.9 - in practice I'm not sure we care much about updating docs for versions older than 1.0?) in the PR that targets master (this PR).

Then we create a bunch of PRs with the backport label, targeting the other branches (1.1, 1.2, 1.3). The way to create those backport PRs is up to you. Some folks do it manually, some folks use npx backport.

[sebgl]

@kilfoyle please let me know if you need help with the backport PRs!

[kilfoyle]

Thanks for your help @sebgl

Some background on this: The CI checks for the docs builds are very sensitive, and will fail if any broken links are detected even in outdated releases. So a broken link even in the 1.0-beta or 0.9 release will, unfortunately, prevent the main docs PR for the 7.10 stack release (elastic/docs#1994) from passing, as well as any subsequent docs PRs.

I've opened backports for:
1.3
1.2
1.1
1.0
1.0-beta
0.9 You mentioned that we needed backport PRs only for the middle releases, but I'm not sure I understand how the change would get into 0.9, so I opened this just in case.

I see @charith-elastic (Thanks Charith!) has suggested we can override the failed CI checks on some of these. Since I don't have authority to merge in this repo, could I ask either of you to help me with that?