Use the env trick for bash.

[3405691582]

Other scripts in bazel do this properly. Not all systems install bash, and they may not be located at /bin.

[gemini-code-assist]

Code Review

The pull request correctly updates the shebang line in generate_jvm_module_options.sh from #!/bin/bash to #!/usr/bin/env bash. This is a good change that improves the portability of the script by allowing the system to locate the bash interpreter using the user's PATH environment variable, rather than relying on a fixed path. This aligns with best practices for shell scripting across different environments.