Update solidity-example.yml

Author: critesjosh

.github/workflows/solidity-example.yml

@@ -24,6 +24,7 @@ jobs:
     - name: Install bb
       run: | 
         curl -L https://raw.githubusercontent.com/AztecProtocol/aztec-packages/refs/heads/master/barretenberg/bbup/install | bash 
+        echo "$HOME/.bbup/bin" >> $GITHUB_PATH
         
     - name: Run bbup
       run: |