[bug] Syntax Error in wait-for-python-server.sh

file ： /opt/gem/wait-for-python-server.sh .
```bash

1 #!/usr/bin/env bash
2
3 set -euo pipefail
4
5 if [[ ${FASTAPI_WAIT_SKIP:-0} != 0 ]]; then
6 exec "$@"
7 fi
8
9 if [[ $# -lt 1 ]]; then
10 echo "wait-for-python-server: missing command to execute" >&2
11 exit 64
12 fi
13
14 host=${FASTAPI_WAIT_HOST:-127.0.0.1}
15 port=${SANDBOX_SRV_PORT:--8091}
16 path=${FASTAPI_WAIT_PATH:-/health}
17 timeout=${FASTAPI_WAIT_TIMEOUT:-10}
18 interval=${FASTAPI_WAIT_INTERVAL:-1}

```

line15.
```bash
port=${SANDBOX_SRV_PORT:--8091}
```

with one more “-” ， shoud be

```bash
port=${SANDBOX_SRV_PORT:-8091}
```