Add Blog Template Google Doc link to the Blog issue template
## Summary
Add a link to the shared **Blog Template** Google Doc in the Blog issue template, with instructions to write each article in a *copy* of that template rather than editing the master.
Blog Template: https://docs.google.com/document/d/1sIlMwB10F7HU6UNNVzs7AedrgYYt_f8BaHqy7a_ztkg/edit?tab=t.0#heading=h.odehl6fbk0z
## Work Track
AI Marketing
## Context / Background
Requested by Paul Johnson (@pdjohnson): the Blog template should point authors at the shared Google Doc template so every article starts from a consistent structure, and authors should always work in their own copy.
## Tasks
- [x] Add a **Proposed resolution** section (or equivalent) to the Blog issue template linking the Blog Template Google Doc.
- [x] Include the instruction: "Write an article in a copy of the Blog Template (File > Make a copy)."
## Acceptance Criteria
- [x] The Blog issue template links to the Blog Template Google Doc.
- [x] The template instructs authors to make their own copy (File > Make a copy) before writing.
## AI Usage
- [x] AI Assisted Issue — This issue was generated with AI assistance, but was reviewed and refined by the creator.
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