fix: examples/xgboost/lightgbm-dist/Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN12-GLIBC-5927132
- https://snyk.io/vuln/SNYK-DEBIAN12-GLIBC-5927132
- https://snyk.io/vuln/SNYK-DEBIAN12-GLIBC-5927132
- https://snyk.io/vuln/SNYK-DEBIAN12-GLIBC-5927132
- https://snyk.io/vuln/SNYK-DEBIAN12-NGHTTP2-5953379

examples/xgboost/lightgbm-dist/Dockerfile

@@ -30,7 +30,7 @@ RUN git clone \
     cd "${HOME}" && \
     rm -rf LightGBM
 
-FROM python:3.7
+FROM python:3.14.0a1
 
 COPY requirements.txt .
 RUN pip install -r requirements.txt