fix: src/kubedash/requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-SELENIUM-6062316

src/kubedash/requirements.txt

@@ -42,7 +42,7 @@ pytest-order>=1.0.1
 pytest-flask>=1.2.0
 responses>=0.22.0
 pytest-playwright>=0.3.1
-selenium>=4.8.2
+selenium>=4.15.1
 
 # for git-changelog
 GitPython==3.1.36