Update .gitlab-ci.yml file

It is "ca-certificates", not "ca-certificate"

.gitlab-ci.yml

@@ -94,7 +94,7 @@ default:
     - - |
           # apt_common
           echo -e "\e[0Ksection_start:`date +%s`:apt_common[collapsed=true]\r\e[0KInstalling common packages"
-      - apt-get install make git ccache nasm cmake ca-certificate
+      - apt-get install make git ccache nasm cmake ca-certificates
       - |
           # apt_common
           echo -e "\e[0Ksection_end:`date +%s`:apt_common\r\e[0K"