Add summary to release

Author: ArBridgeman

doc/changes/changes_1.7.0.md

@@ -1,4 +1,22 @@
 # 1.7.0 - 2025-07-28
+
+## Summary
+
+This version of the PTB alters the nox session `release:prepare` to include direct dependency changes between the current and latest tag (based on the `poetry.lock` files).
+This benefits developers by automating the cumbersome process of determining what changed between tags, and it does so
+in a deterministic and consistent way. If there are dependency changes, then they will be rendered
+as:
+
+```markdown
+## Dependency Updates
+
+### `main`
+* Updated dependency `package_1:0.0.1` to `0.1.0`
+
+### `dev`
+* Added dependency `package_2:0.2.0`
+```
+
 ## Documentation
 
 * #504: Removed Issue Tracking & Style Guides, moved & updated "Create a release", moved & updated "Collecting metrics"