fix: docs/samples/v1beta1/transformer/feast/driver_transformer.Docker…

…file to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN12-ZLIB-6008963
- https://snyk.io/vuln/SNYK-DEBIAN12-GLIBC-1547196
- https://snyk.io/vuln/SNYK-DEBIAN12-GLIBC-1547293
- https://snyk.io/vuln/SNYK-DEBIAN12-GLIBC-1547373
- https://snyk.io/vuln/SNYK-DEBIAN12-GNUPG2-3330747

docs/samples/v1beta1/transformer/feast/driver_transformer.Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.9-slim
+FROM python:3.14.0a3-slim
 
 COPY driver_transformer driver_transformer
 WORKDIR driver_transformer