Fix link in fetch-schemas.sh

Author: reginareynolds

scripts/fetch-schemas.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 REPO_ROOT=$(git rev-parse --show-toplevel)
-BRANCH_OR_TAG="${1:-v5.0.0}"
+BRANCH_OR_TAG="${%40interledger/open-payments%405.0.0}"
 BASE_URL="https://raw.githubusercontent.com/interledger/open-payments/$BRANCH_OR_TAG"
 
 OUT_DIR="$REPO_ROOT/openapi"