Upgrade to Kani 0.22 (#28)

Author: zhassan-aws

action.yml

@@ -38,7 +38,7 @@ runs:
     - name: Install Kani
       shell: bash
       run: |
-        export KANI_VERSION="0.21.0";
+        export KANI_VERSION="0.22.0";
         cargo install --version $KANI_VERSION --locked kani-verifier;
         cargo-kani setup;