Fix actions inputSecretsToActionSecrets returning duplicates of the last provided secret

[Tenrys]

🔧 Changes

Currently, adding multiple secrets only takes into account the last secret provided to the CLI, even though they are all in the map provided by the command.

Looking deeper after printing around a bit, it seemed that the inputSecretsToActionSecrets function was the culprit, so I made a very simple change to account for how pointers and loop variables work together.

📚 References

I've never used Go so I asked GitHub Copilot for some help, and it did fix the issue after testing it.

🔬 Testing

This is the command I used to test changes:

go run ./cmd/auth0 actions update <action-id> -n pre-user-registration -c "hello" -s "USER_REDIRECT_URL=http://localhost:9000/callback" -s "AGENT_REDIRECT_URL=http://localhost:9000/callback" -s "CUSTOMER_REDIRECT_URL=http://localhost:9000/callback" --json

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)

[willvedd]

Appreciate you taking the time to create this PR. We love when the community makes contributions! However, I had been working on a duplicate PR in parallel (#844 ). I will be closing this one out. If you can review #844 that would be great. Thanks for your help!