Update image to include gcloud auth package (#4075)

* feat(jupyterhub): update to include gcloud auth package
---------

Co-authored-by: V <[email protected]>

Author: vevetron

.github/CODEOWNERS

@@ -1,2 +1,2 @@
 # repo owners
-*                                       @evansiroky @vevetron @tiffanychu90 @ohrite @erikamov @charlie-costanzo @mjumbewu @fsalemi
+*                                       @evansiroky @vevetron @tiffanychu90 @ohrite @erikamov @charlie-costanzo @mjumbewu @fsalemi @raebot

images/jupyter-singleuser/Dockerfile

@@ -32,8 +32,8 @@ RUN npm install -g --unsafe-perm=true --allow-root netlify-cli
 RUN npm install -g --unsafe-perm=true --allow-root sql-language-server
 # gcloud CLI https://cloud.google.com/sdk/docs/install#deb
 RUN cd $GCLOUD_HOME \
-    && curl -O https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-cli-512.0.0-linux-x86_64.tar.gz \
-    && tar -zxvf google-cloud-cli-512.0.0-linux-x86_64.tar.gz \
+    && curl -O https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-cli-529.0.0-linux-x86_64.tar.gz \
+    && tar -zxvf google-cloud-cli-529.0.0-linux-x86_64.tar.gz \
     && ./google-cloud-sdk/install.sh
 ENV PATH="$GCLOUD_HOME/google-cloud-sdk/bin:$PATH"