Update stellar/stellar-cli action to v22.8.1 (#570)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/test.yml

@@ -108,7 +108,7 @@ jobs:
 
       - name: Set up Stellar CLI
         if: matrix.package == 'stellar'
-        uses: stellar/stellar-cli@v22.5.0
+        uses: stellar/stellar-cli@v22.8.1
 
       - name: Install Scaffold & Registry CLIs
         if: matrix.package == 'stellar'