Release 0.7.2

[hjkristenson]

Description of this release

This PR replaces the relative link with the full URL for the watermasking readme so that the link will also work in hyp3-docs, which references this readme file for the asf_tools information page.

Developer checklist

• Assigned a reviewer

• Indicated the level of changes to this package by affixing one of these labels:

  • major -- Major changes to the API that may break current workflows
  • minor -- Minor changes to the API that do not break current workflows
  • patch -- Patches and bugfixes for the current version that do not break current workflows
  • bumpless -- Changes to documentation, CI/CD pipelines, etc. that don't affect the software's version

• (If applicable) Updated the dependencies and indicated any downstream changes that are required

• Updated CHANGELOG.md

• Added/updated documentation for these changes

• Added/updated tests for these changes

Reviewer checklist

• Have all dependencies been updated?
• Is the level of changes labeled appropriately?
• Are all the changes described appropriately in CHANGELOG.md?
• Has the documentation been adequately updated?
• Are the tests adequate?