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What article on docs.github.com is affected?

YAML examples in https://docs.github.com/actions

What part(s) of the article would you like to see updated?

YAML treats floats like 2.10 as 2.1. This can lead to workflows using a different language version than intended. We should update the YAML examples to quote language versions to avoid this. To help users who copy-paste-modify without understanding the nuance, we should quote all language versions, even ones that would not be affected by this parsing.

For example:

jobs:
  build:

    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: [3.6, 3.7, 3.8, 3.9]

should be changed to

jobs:
  build:

    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: ["3.6", "3.7", "3.8", "3.9"]

Then if a user copies the example but wants to include version 3.10, they can easily plug in the new value without knowing they need to add quotes.

Additional information

No response