build(deps): bump docs/src/firmware-action-example

Bumps [docs/src/firmware-action-example](https://github.com/9elements/firmware-action-example)
from `75417b3` to `9f2753e`.

---
updated-dependencies:
- dependency-name: docs/src/firmware-action-example
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: AtomicFS <vojtech.vesely@9elements.com>