WIP: update images reference doc for 1.2.2 release

[gsunner]

What this PR does / why we need it:

This prep fo rthe 1.2.2 release

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[seldondev]

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[seldondev]

STARTING TEST [ lint # 2 ]

Logs will be available when test completes in the following link:
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-2167/2.log

Impatient try:
jx get build logs SeldonIO/seldon-core/PR-2167 --build=2

[seldondev]

STARTING TEST [ pr-build # 1 ]

Logs will be available when test completes in the following link:
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-2167/1.log

Impatient try:
jx get build logs SeldonIO/seldon-core/PR-2167 --build=1

[seldondev]

SUCCESS [lint # 2] TEST PASSED ✅

Well done! 😎

[seldondev]

SUCCESS [pr-build # 1] TEST PASSED ✅

Well done! 😎