fix(deps): update dependency xstate to ^4.38.0 for gatsby-source-filesystem

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
xstate (source)	^4.37.2 -> ^4.38.0

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Release Notes

statelyai/xstate (xstate)

v4.38.0

Compare Source

Minor Changes

• #​4098 ae7691811 Thanks @​davidkpiano! - The log, pure, choose, and stop actions were added to the main export:

  import { log, pure, choose, stop } from 'xstate';

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