Prep for March 7 0.13.1 support on Goerli

[stoobie]

Description of the Changes

Adding 0.13.1 info (Goerli support) to footer and Release notes.

PR Preview URL

• Starknet release notes
• Notice the footer:

Check List

• [x] Changes have been done against main branch, and PR does not conflict
• [x] PR title follows the convention: <docs/feat/fix/chore>(optional scope): <description>, e.g: fix: minor typos in code

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This change is 

[github-actions[bot]]

Your preview build is ready! ✨ Check the following link in 1-2 minutes: https://starknet-io.github.io/starknet-docs/pr-1155/documentation/ .

[github-actions[bot]]

Your preview build is ready! ✨ Check the following link in 1-2 minutes: https://starknet-io.github.io/starknet-docs/pr-1155/documentation/ .

[github-actions[bot]]

Your preview build is ready! ✨ Check the following link in 1-2 minutes: https://starknet-io.github.io/starknet-docs/pr-1155/documentation/ .

[github-actions[bot]]

Your preview build is ready! ✨ Check the following link in 1-2 minutes: https://starknet-io.github.io/starknet-docs/pr-1155/documentation/ .

[github-actions[bot]]

Your preview build is ready! ✨ Check the following link in 1-2 minutes: https://starknet-io.github.io/starknet-docs/pr-1155/documentation/ .

[github-actions[bot]]

Your preview build is ready! ✨ Check the following link in 1-2 minutes: https://starknet-io.github.io/starknet-docs/pr-1155/documentation/ .

[github-actions[bot]]

Your preview build is ready! ✨ Check the following link in 1-2 minutes: https://starknet-io.github.io/starknet-docs/pr-1155/documentation/ .

[github-actions[bot]]

Your preview build is ready! ✨ Check the following link in 1-2 minutes: https://starknet-io.github.io/starknet-docs/pr-1155/documentation/ .

[stoobie]

LGTM from @iliav-starkware offline. @iliav-starkware Please approve here too.