update upgrade test with wasmvm version

Author: MSalopek

.github/workflows/test.yml

@@ -163,10 +163,10 @@ jobs:
       # the old gaiad binary version is hardcoded, need to be updated each major release.
       - name: Install Old Gaiad
         run: |
-          git checkout v18.1.0
-          make build
-          cp ./build/gaiad ./build/gaiadold
-          go clean -modcache
+          curl -LO https://github.com/cosmos/gaia/releases/download/v18.1.0/gaiad-v18.1.0-linux-amd64
+          chmod a+x gaiad-v18.1.0-linux-amd64
+          mkdir build
+          cp ./gaiad-v18.1.0-linux-amd64 ./build/gaiadold
         if: env.GIT_DIFF
       - name: Install New Gaiad
         run: |