Updated the billing alerts documentation to reflect the new spike alerts
feature added in PR #2829. The documentation now explains both standard
alerts (75%, 90%, 100%, 200%, 500%) and spike alerts (10x, 20x, 50x,
100x) that help catch runaway usage from bugs or errors.
## Files changed
- `docs/how-to-reduce-your-spend.mdx` - Added section explaining the two
types of billing alerts
Generated from [Chore(webapp): Adds additional billing
alerts](https://github.com/triggerdotdev/trigger.dev/pull/2829) @samejr
Co-authored-by: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>
mintlify[bot]