Update breaking changes guide with how to use reusable content blocks (…

…#68116)

## What
<!--
* Describe what the change is solving. Link all GitHub issues related to
this change.
-->

Updated the guide AJ produced for breaking connector changes. Adds
instructions to use the block of generic connector upgrade information
that can be added dynamically.

## How
<!--
* Describe how code changes achieve the solution.
-->

## Review guide
<!--
1. `x.py`
2. `y.py`
-->

## User Impact
<!--
* What is the end result perceived by the user?
* If there are negative side effects, please list them. 
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## Can this PR be safely reverted and rolled back?
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* If unsure, leave it blank.
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- [x] YES 💚
- [ ] NO ❌

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Co-authored-by: Patrick Nilan <nilan.patrick@gmail.com>

1.8 release notes (#64145)

Rbroughan/productionalize direct loader (#61528)

Co-authored-by: Octavia Squidington III <octavia-squidington-iii@users.noreply.github.com>

A quick second pass through the custom components topic (#56462)

#11504 v1.5 release notes (#53647)

Co-authored-by: Alexandre Cuoci <Hesperide@users.noreply.github.com>

airbyte-ci: correct mounted volumes ownership (#51582)

v-1.3-release-note (#48827)

1.2 release notes (#48127)

docs: 1.1.0 release noes (#46320)

docs(source-intercom): Update outdated URLs in docs (#45858)