Upkeep: Update pinned library versions (#606)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: priyaananthasankar

linux/base.Dockerfile

@@ -172,7 +172,7 @@ RUN chmod 755 /usr/local/bin/ansible* \
 
 
 # Install specific version of Istio from GitHub releases
-ENV ISTIO_VERSION=1.28.3
+ENV ISTIO_VERSION=1.29.1
 RUN export TMP_DIR=$(mktemp -d) \
   && cd "${TMP_DIR}" \
   && curl -L https://github.com/istio/istio/releases/download/${ISTIO_VERSION}/istio-${ISTIO_VERSION}-linux-amd64.tar.gz -o istio.tar.gz \