release: switch AI bump-decider to Claude Haiku 4.5

Author: benvinegar

.github/workflows/release-on-main.yml

@@ -90,7 +90,7 @@ jobs:
 
           echo "has_changes=true" >> "$GITHUB_OUTPUT"
 
-      - name: Decide release bump with Claude Sonnet
+      - name: Decide release bump with Claude Haiku 4.5
         id: decide
         if: steps.prs.outputs.has_changes == 'true'
         env:
@@ -122,7 +122,7 @@ jobs:
           PROMPT=$(echo "$PROMPT" | sed 's/^          //')
 
           jq -n \
-            --arg model "claude-3-5-sonnet-latest" \
+            --arg model "claude-haiku-4-5" \
             --arg system "You are precise and must output strict JSON only." \
             --arg prompt "$PROMPT" \
             --arg last_tag "$LAST_TAG" \