[CI] Update GoogleTest in ci_wasm (apache#11207)

Looks like I missed this one in apache#11162 due to missing the cpptest call
in the Jenkinsfile

Author: Mousius

docker/Dockerfile.ci_wasm

@@ -21,6 +21,9 @@ RUN apt-get update --fix-missing
 COPY install/ubuntu_install_core.sh /install/ubuntu_install_core.sh
 RUN bash /install/ubuntu_install_core.sh
 
+COPY install/ubuntu_install_googletest.sh /install/ubuntu_install_googletest.sh
+RUN bash /install/ubuntu_install_googletest.sh
+
 COPY install/ubuntu1804_install_python.sh /install/ubuntu1804_install_python.sh
 RUN bash /install/ubuntu1804_install_python.sh