centos-7: Update pybind11 to 2.4.3

centos-7/Dockerfile

@@ -237,7 +237,7 @@ RUN version=1.5.1 && \
     ninja -C build
 
 # pybind11
-RUN version=2.3.0 && \
+RUN version=2.4.3 && \
     source /etc/profile && \
     cd /tmp && \
     curl -sSL -o pybind11-${version}.tar.gz https://github.com/pybind/pybind11/archive/v${version}.tar.gz && \