docs: name the Blast radius section in the two Capy body-order lists

The docs re-audit found capy/skill/gstack/SKILL.md (Merge asks) and docs/capy-install.md still listing the Capy PR body as What changed, Why, Approvals; both now match capy-pr.md.tmpl.

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

capy/skill/gstack/SKILL.md

@@ -49,7 +49,7 @@ When you work for a Capy Captain (a crew thread) or straight for a person, gstac
 - **These always need a fresh ask:** a product or behaviour decision, spend over a stated cap, anything published outside the repository, a change to a threshold, budget or trial count, closing someone's contribution without landing it, and anything destructive.
 - **Record every answer.** Use `gstack-approvals add --ask … --words "<their exact words>" --by … --scope …`, or after an autoplan answer, `gstack-approvals import --autoplan <run dir> --by <name>`. `gstack-approvals render` prints the `## Approvals` table for your report and the PR body. Rows are secret-scanned, and on Capy they are mirrored to the private Drive folder.
 - **Plan approvals** use `gstack-owner-brief render --captain --out <run dir>`. It prints before → after, why it matters, what caused this work, the big decisions (options, the pick, why, what would flip it) and what we need, with `rec` as the recommended one-word reply. Relay it whole. Gate codes appear only on its last line, which is for you. If it exits `CAPTAIN_BRIEF_INCOMPLETE`, add the missing plan sections first.
-- **Merge asks.** /ship's PR body opens with `## What changed` (captioned before/after images from `gstack-pr-shots` or a UI screenshot, uploaded with Capy's PR asset tool), `## Why` and `## Approvals`. Your READY report attaches the key image.
+- **Merge asks.** /ship's PR body opens with `## What changed` (captioned before/after images from `gstack-pr-shots` or a UI screenshot, uploaded with Capy's PR asset tool), `## Why`, `## Blast radius` and `## Approvals`. Your READY report attaches the key image.
 
 ## Before any push or pull request
 

docs/capy-install.md

@@ -436,7 +436,7 @@ prints `CAPY: on` and a `capy-asks` block: decisions go through Capy (a crew
 thread asks its Captain, otherwise the person), plan approvals are rendered
 with `gstack-owner-brief render --captain`, answers are recorded with
 `gstack-approvals`, and /ship's PR body opens with before/after images
-(`gstack-pr-shots`), Why and Approvals. The guide is
+(`gstack-pr-shots`), Why, Blast radius and Approvals. The guide is
 [`capy/skill/gstack/captain.md`](../capy/skill/gstack/captain.md);
 `GSTACK_CAPY_ASKS=0` drops the block for one session. The controller's side (the
 READY contract, merge trains, the digest, the daily flaky pass, with templates for the