fix: yq doesn't need a -o=json argument

[doggy8088]

This pull request updates several run.sh scripts across multiple Codex CLI examples to simplify the usage of the yq command by removing the -o=json option. This change ensures consistent handling of YAML files without explicitly converting them to JSON.

Updates to yq Command Usage:

• Removed the -o=json option from the yq command when extracting the task_name in codex-cli/examples/build-codex-demo/run.sh.
• Removed the -o=json option from the yq command when extracting the description in codex-cli/examples/build-codex-demo/run.sh.
• Applied the same updates to codex-cli/examples/camerascii/run.sh, codex-cli/examples/impossible-pong/run.sh, and codex-cli/examples/prompt-analyzer/run.sh for both task_name and description extraction. [1] [2]

[codex-maintainers]

Thanks for the contribution! We're primarily focused on the native/Rust implementation of Codex CLI and would love to see if this is still an issue on the latest version. If it is, we're happy to take a look at a PR to the codex-rs/ implementation.