Replacement PR body text confusion if repo has custom rules

[HonkingGoose]

Describe the proposed change(s).

I suggested we add a text to the PR body during the review process ¹:

renovate/lib/config/options/index.ts

Lines 1231 to 1233 in a2c39b9

	prBodyNotes: [
	'This is a special PR that replaces `{{{depNameSanitized}}}` with the community suggested minimal stable replacement version.',
	],

But I just realized: a repository admin set their own replacements in the renovate.json file and then the wording is confusing.

Maybe we can change the code like this?

GIVEN Renovate creates a replacement PR
THEN Renovate checks the source of the replacement name and version
IF source of replacement name/version is the community file in the main renovate repo, use current text.
IF source of replacement name/version is from a custom config, use different text.

Or else we could change the wording, so that it doesn't specify the source of the replacement name/version.

Footnotes

1. https://github.com/renovatebot/renovate/pull/5558 ↩