Update apprise requirement from ~=1.8.1 to ~=1.9.0

Updates the requirements on [apprise](https://github.com/caronc/apprise) to permit the latest version.
- [Release notes](https://github.com/caronc/apprise/releases)
- [Commits](caronc/apprise@v1.8.1...1.9.0)

---
updated-dependencies:
- dependency-name: apprise
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -7,7 +7,7 @@ numpy>=1.22.2 # not directly required, pinned by Snyk to avoid a vulnerability
 setuptools
 psutil
 blinker==1.7.0 # prevents issues on newer versions
-apprise~=1.8.1
+apprise~=1.9.0
 pyyaml~=6.0.2
 urllib3>=2.2.2 # not directly required, pinned by Snyk to avoid a vulnerability
 requests-oauthlib~=2.0.0