fix: pkg/devspace/compose/testdata/depends_on_with_build/backend/Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE323-OPENSSL-15120869
- https://snyk.io/vuln/SNYK-ALPINE323-OPENSSL-15120870
- https://snyk.io/vuln/SNYK-ALPINE323-OPENSSL-15120871
- https://snyk.io/vuln/SNYK-ALPINE323-OPENSSL-15120872
- https://snyk.io/vuln/SNYK-ALPINE323-OPENSSL-15120873