fix created property format, update stactools dep to 0.5.2

[philvarner]

Related issues

n/a

Description

1. Fixes the population of the created field to have a valid RFC 3339 datetime. Previously, the string was missing the seconds.
2. Fixes all of the examples that had this invalid datetime string.
3. Update stactools dependency to require at least 0.5.2, as the reproject_shape was not added until v0.5.2 in Enforce that shapely be >=2.0.0 and unify reproject_* by @jsignell in https://github.com/stac-utils/stactools/pull/441
4. Update all pre-commit versions

Checklist

• Includes tests
• Includes documentation
• Updates CHANGELOG