Merge branch 'upgrate-to-expat-2.4.6' into 'release-8.0'

Upgrade expat to 2.4.6

See merge request !896

(cherry picked from commit 852718ed)

cfb8ae4c ENH: Upgrade expat to 2.4.6
63d3668c BUG: URL for NETCDF changed

SuperBuild/CMake/External_expat.cmake

@@ -24,8 +24,8 @@ SETUP_SUPERBUILD(EXPAT)
 
 ExternalProject_Add(EXPAT
   PREFIX EXPAT
-  URL "https://downloads.sourceforge.net/project/expat/expat/2.4.1/expat-2.4.1.tar.gz"
-  URL_MD5 8738ef9ed1c5dcc03207286ea84f4299
+  URL "https://downloads.sourceforge.net/project/expat/expat/2.4.6/expat-2.4.6.tar.gz"
+  URL_MD5 f1a94f57311ba32e7a525ab0a098cccf
   BINARY_DIR ${EXPAT_SB_BUILD_DIR}
   INSTALL_DIR ${SB_INSTALL_PREFIX}
   DOWNLOAD_DIR ${DOWNLOAD_LOCATION}

SuperBuild/CMake/External_netcdf.cmake

@@ -36,8 +36,8 @@ endif()
 
 ExternalProject_Add(NETCDF
   PREFIX NETCDF
-  URL "https://www.unidata.ucar.edu/downloads/netcdf/ftp/netcdf-c-4.7.4.tar.gz"
-  URL_MD5 3e0a97e6abb9a989f8a8a2e395473597
+  URL "https://github.com/Unidata/netcdf-c/archive/refs/tags/v4.7.4.tar.gz"
+  URL_MD5 33979e8f0cf4ee31323fc0934282111b
   SOURCE_DIR ${NETCDF_SB_SRC}
   BINARY_DIR ${NETCDF_SB_BUILD_DIR}
   INSTALL_DIR ${SB_INSTALL_PREFIX}