[blog] Add post about v5 Migration guide update

[samuelsycamore]

Preview: https://deploy-preview-33063--material-ui.netlify.app/blog/migration-update/

This PR adds a post to the blog to inform users that we've updated the Migration guide.

Since this wasn't substantial enough to flesh out into a whole article, I've framed it in terms of "top reasons why you should migrate to v5" as a way to provide the reader with more value and ideally strengthen the call to action (to check out the new migration guide).

[mui-bot]

No bundle size changes

Generated by 🚫 dangerJS against 53fec57

[mnajdova]

@samuelsycamore would be great if we can also merge #33005 before the blogpost :)

[mnajdova]

Also on the tweet we could mention:

• the jss to tss-react codemod
• new nextjs project example for setting up Material UI v5 + @mui/styles (JSS) ([examples] Add example using nextjs & @mui/styles as a starter for the migration to v5 #33005)

[mnajdova]

Looks great, left one suggestion, feel free to disregard if you don't think it's worth mentioning :)

[danilo-leal]

Content-wise it's great! Short and simple!

My only consideration is: I wonder if we shouldn't add a couple of examples for the new styling engine (what's the difference from a code perspective); global class names (how does that look like); and IntelliSense (maybe a gif of VS Code with it working?).

Additionally, I added the OG image card but I'm not sure if it'll work given the image is not used within the .md file... @siriwatknp would you know about that?

[siriwatknp]

Additionally, I added the OG image card but I'm not sure if it'll work given the image is not used within the .md file... @siriwatknp would you know about that?

@danilo-leal The path looks good except for the image extension. It should be .png

[samuelsycamore]

My only consideration is: I wonder if we shouldn't add a couple of examples for the new styling engine (what's the difference from a code perspective); global class names (how does that look like); and IntelliSense (maybe a gif of VS Code with it working?).

All great ideas, thanks @danilo-leal! I always struggle to come up with ways to add visual appeal to articles like this! I'll incorporate these suggestions into the next draft.

[danilo-leal]

Looking awesome, excellent work!

Added an additional image there just so the post is a bit more eye-catching and also edited a bit the IntelliSense one 👌

[siriwatknp]

👍 Updated the thumbnail to .png to show on social preview.

[oliviertassinari]

Great idea!

I have seen some people looking for moving to v5 because of the new components/features in MUI X. I wonder if it's something that can resonate.

[oliviertassinari]

I have tried to click on this image 😁

[mnajdova]

No blockers from my side :)