[support-infra] Add synchronize to workflow triggers

[michelengelen]

The check type label workflow did not get triggered on updates to the PR HEAD, so it was stuck in an unresolved state.

This should fix it.

[mui-bot]

Deploy preview: https://deploy-preview-19342--material-ui-x.netlify.app/

Bundle size report

Bundle	Parsed size	Gzip size
@mui/x-data-grid	0B(0.00%)	0B(0.00%)
@mui/x-data-grid-pro	0B(0.00%)	🔺+5B(0.00%)
@mui/x-data-grid-premium	0B(0.00%)	🔺+4B(0.00%)
@mui/x-charts	0B(0.00%)	0B(0.00%)
@mui/x-charts-pro	0B(0.00%)	🔺+2B(0.00%)
@mui/x-date-pickers	0B(0.00%)	0B(0.00%)
@mui/x-date-pickers-pro	0B(0.00%)	🔺+7B(+0.01%)
@mui/x-tree-view	0B(0.00%)	0B(0.00%)
@mui/x-tree-view-pro	0B(0.00%)	🔺+3B(+0.01%)

Details of bundle changes

Generated by 🚫 dangerJS against 5ce0bd0

[oliviertassinari]

Nice 👍, the CI is tied to a commit, so it needs to run on each.

With the initial GitHub Action (mui/material-ui#32886), we did https://github.com/mui/material-ui/blob/41da88f24d0c2a2ccb5480a95d352a6650607080/.github/workflows/check-if-pr-has-label.yml#L5, but this is a fork of https://github.com/mheap/github-action-required-labels?tab=readme-ov-file#complete-example, which does it correctly like in this PR.

I have updated mui/mui-public#206 to flag that check-if-pr-has-label.yml is now legacy, it's replaced with our new .github/workflows/check-if-pr-has-type-label.yml