Switch to newer CI image to build csync tests

This new image brings the cmocka dependency and thus will make the CI
build the csync tests which depend on it.

Signed-off-by: Kevin Ottens <kevin.ottens@nextcloud.com>

.drone.yml

@@ -3,7 +3,7 @@ name: qt-5.12
 
 steps:
 - name: cmake
-  image: nextcloudci/client-5.12:client-5.12-10
+  image: nextcloudci/client-5.12:client-5.12-11
   volumes:
     - name: build
       path: /drone/build
@@ -11,7 +11,7 @@ steps:
     - cd /drone/build
     - cmake -DCMAKE_C_COMPILER=gcc-10 -DCMAKE_CXX_COMPILER=g++-10 -DCMAKE_BUILD_TYPE=Debug -DNO_SHIBBOLETH=1 -DBUILD_UPDATER=ON -DUNIT_TESTING=1 -DSANITIZE_ADDRESS=ON ../src
 - name: compile
-  image: nextcloudci/client-5.12:client-5.12-10
+  image: nextcloudci/client-5.12:client-5.12-11
   volumes:
     - name: build
       path: /drone/build
@@ -19,7 +19,7 @@ steps:
     - cd /drone/build
     - make -j$(nproc)
 - name: test
-  image: nextcloudci/client-5.12:client-5.12-10
+  image: nextcloudci/client-5.12:client-5.12-11
   volumes:
     - name: build
       path: /drone/build
@@ -46,7 +46,7 @@ name: qt-5.12-clang
 
 steps:
 - name: cmake
-  image: nextcloudci/client-5.12:client-5.12-10
+  image: nextcloudci/client-5.12:client-5.12-11
   volumes:
     - name: build
       path: /drone/build
@@ -54,7 +54,7 @@ steps:
     - cd /drone/build
     - cmake -GNinja -DCMAKE_EXPORT_COMPILE_COMMANDS=ON DCMAKE_C_COMPILER=clang-10 -DCMAKE_CXX_COMPILER=clang++-10 -DCMAKE_BUILD_TYPE=Debug -DNO_SHIBBOLETH=1 -DBUILD_UPDATER=ON -DUNIT_TESTING=1 -DSANITIZE_ADDRESS=ON ../src
 - name: compile
-  image: nextcloudci/client-5.12:client-5.12-10
+  image: nextcloudci/client-5.12:client-5.12-11
   volumes:
     - name: build
       path: /drone/build
@@ -62,7 +62,7 @@ steps:
     - cd /drone/build
     - ninja
 - name: test
-  image: nextcloudci/client-5.12:client-5.12-10
+  image: nextcloudci/client-5.12:client-5.12-11
   volumes:
     - name: build
       path: /drone/build
@@ -72,7 +72,7 @@ steps:
     - chown -R test:test .
     - su -c 'ASAN_OPTIONS=detect_leaks=0 ctest --output-on-failure' test
 - name: clang-tidy
-  image: nextcloudci/client-5.12:client-5.12-10
+  image: nextcloudci/client-5.12:client-5.12-11
   volumes:
     - name: build
       path: /drone/build