Replace usage of `flow style` with `block style` for job dependencies

[yeikel]

What problem are you trying to solve?

• Prefer the usage of the block style as it improves readability
• Source control of Block Style blocks is also easier

Flow Style: Uses square brackets [] for arrays. Example: items: [item1, item2, item3]

Block Style: Uses new lines and indentation for arrays and objects

items:
  - item1
  - item2
  - item3

What precondition(s) should be checked before applying this recipe?

The job depends on more than one job and uses the flow style declaration

Describe the situation before applying the recipe

  job:
    needs: [ dependency_1, dependency_2, dependency_3, dependency_4, dependency_5... ]
    uses: ...

Describe the situation after applying the recipe

  job:
    needs: 
       - dependency_1
       - dependency_2
       - dependency_3
       - dependency_4
       - dependency_5
    uses: ...

Any additional context

https://www.yaml.info/learn/flowstyle.html
https://syedrakib.medium.com/block-style-yaml-vs-flow-style-yaml-a42eb1082202

[greg-at-moderne]

Maybe this should be a general "apply formatting best practices for Github Actions" recipe.