docs(release-checklist): Update PostgreSQL requirement

Add step to update the minimum PostgreSQL version in the programming
error template. Ensures the release checklist aligns with current
version requirements.

Author: pheus

docs/development/release-checklist.md

@@ -53,6 +53,7 @@ If a new Django release is adopted or other major dependencies (Python, PostgreS
 
 * Update the installation guide (`docs/installation/index.md`) with the new minimum versions.
 * Update the upgrade guide (`docs/installation/upgrading.md`) for the current version accordingly.
+* Update the minimum PostgreSQL version in the programming template (`netbox/templates/exceptions/programming_error.html`).
 
 ### Manually Perform a New Install