update-to-0.31.0 (#39)

Author: jaisnan

action.yml

@@ -36,7 +36,7 @@ runs:
     - name: Install Kani
       shell: bash
       run: |
-        export KANI_VERSION="0.30.0";
+        export KANI_VERSION="0.31.0";
         cargo install --version $KANI_VERSION --locked kani-verifier;
         cargo-kani setup;