fix: install snap instead of assuming it is installed

Author: CallMeLeopoldo

src/jobs/microk8s_install.yml

@@ -67,6 +67,9 @@ steps:
   - run:
       name: Install microk8s and addon dependencies
       command: |
+        if ! which snap > /dev/null; then
+          sudo apt-get install snapd; \
+        fi
         sudo snap refresh
         sudo apt update && sudo apt install nfs-common -y