Fix example for format transform

[turkenh]

This PR fixes example for format transform on master and for v1.13. It is correct in older versions already.

Currently, it is documented as:

patches:
  - type: FromCompositeFieldPath
    fromFieldPath: spec.field1
    toFieldPath: metadata.annotations["stringAnnotation"]
    transforms:
      - type: string
        string:
          type: Format
          format:
            fmt: "the-field-%s"

Which fails as:

Composition in version "v1" cannot be handled as a Composition: strict decoding error: unknown field "spec.resources[0].patches[0].transforms[0].string.format"

The correct version of it should be:

patches:
  - type: FromCompositeFieldPath
    fromFieldPath: spec.field1
    toFieldPath: metadata.annotations["stringAnnotation"]
    transforms:
      - type: string
        string:
          type: Format
          fmt: "the-field-%s"

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[phisco]

😅 #537

[turkenh]

😅 #537

Ahh, thanks for the pointer @phisco :)