Add a deprecation note about Yaml::parse() file support #12701
minor #12727 [DEPRECATION] Add a deprecation note about Yaml::parse() file support #12701 (h4cc)

This PR was merged into the 2.7 branch.

Discussion
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[DEPRECATION] Add a deprecation note about Yaml::parse() file support #12701

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets | #12701
| License       | MIT
| Doc PR        |

Commits
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4ef4c2c Add a deprecation note about Yaml::parse() file support #12701