fix(Breadcrumb): fixed dropdown scroll

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[x] tests are included
[x] changes are accessible and documented from components stories
[x] typings are updated or integrated accordingly with your changes
[x] all added components are exported from index file (if necessary)
[x] all added files include Apache 2.0 license
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[x] necessary labels have been applied to this pull request (enhancement, bug, ecc.)

mia-platform / design-system