github: warn Claude about v0.x semver semantics in minor reviews

Semver treats everything before v1.0.0 as unstable: minor bumps in
v0.x may contain breaking changes. The prompt now flags this so Claude
applies extra scrutiny to pre-v1 minor updates.

Author: danielorbach

.github/workflows/dependabot-automerge.yml

@@ -81,9 +81,12 @@ jobs:
 
             Use `gh pr diff` and `gh pr view` to review the changes.
 
-            Minor updates should be backwards-compatible. If the changes look
-            reasonable, approve the PR with a message that includes your model
-            identifier (e.g. "Reviewed by claude-sonnet-4-20250514").
+            Minor updates should be backwards-compatible. However, for v0.x
+            dependencies, minor bumps may contain breaking changes per semver.
+            Review those with extra caution.
+
+            If the changes look reasonable, approve the PR with a message that
+            includes your model identifier (e.g. "Reviewed by claude-sonnet-4-20250514").
 
             Use: gh pr review --approve --body "your message"
           claude_args: |