Fix typo in example code

[OOHehir]

dts: bindings: input: espressif: esp32-touch-sensor.yaml: fix typo

The documentation example code contains incorrect characters.
This PR fixes this.

Fixes #71197

Signed-off-by: Owen O'Hehir oo.hehir@gmail.com

[github-actions]

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[OOHehir]

Signed-off-by added. Need to re-run compliance check.

[marekmatej]

The Signed-off line should go into the commit message, not the PR description.

[OOHehir]

OK, I'll close & start again