fix: docker/py38.Dockerfile to reduce vulnerabilities
fix: docker/py38.Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE311-KRB5-1043935
- https://snyk.io/vuln/SNYK-ALPINE311-OPENSSL-1075737
- https://snyk.io/vuln/SNYK-ALPINE311-OPENSSL-1075738
- https://snyk.io/vuln/SNYK-ALPINE311-OPENSSL-1075738
- https://snyk.io/vuln/SNYK-ALPINE311-SQLITE-587424
pact-foundation/pact-python,pact-foundation/pact-python