Bump amcrest from 1.9.3 to 1.9.4

Bumps [amcrest](https://github.com/tchellomello/python-amcrest) from 1.9.3 to 1.9.4.
- [Release notes](https://github.com/tchellomello/python-amcrest/releases)
- [Commits](https://github.com/tchellomello/python-amcrest/compare/1.9.3...1.9.4)

---
updated-dependencies:
- dependency-name: amcrest
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1,3 +1,3 @@
-amcrest==1.9.3
+amcrest==1.9.4
 paho-mqtt==1.6.1
 python-slugify==5.0.2