Update .cirrus.yml

Author: opcm

.cirrus.yml

@@ -20,4 +20,4 @@ task:
     - cd ..
     - scan-build cmake -B build -DCMAKE_INSTALL_PREFIX=.
     - cd build
-    - scan-build --exclude src/simdjson --status-bugs gmake install
+    - scan-build --exclude src/simdjson --status-bugs gmake -j