gitlab-ci: update Debian base images

.gitlab/os-linux.yml

@@ -45,7 +45,7 @@
 ### Debian
 
 .debian10:
-    image: "kitware/cmake:ci-debian10-x86_64-2021-04-06"
+    image: "kitware/cmake:ci-debian10-x86_64-2021-05-11"
 
     variables:
         GIT_CLONE_PATH: "$CI_BUILDS_DIR/cmake ci"
@@ -60,7 +60,7 @@
         CMake_SKIP_INSTALL: 1
 
 .debian10_aarch64:
-    image: "kitware/cmake:ci-debian10-aarch64-2021-04-06"
+    image: "kitware/cmake:ci-debian10-aarch64-2021-05-11"
 
     variables:
         GIT_CLONE_PATH: "$CI_BUILDS_DIR/cmake ci"