fix: agent hook

Author: Spelkington

.github/agents/dev-relations.agent.md

@@ -1,7 +1,7 @@
 ---
 description: "Use when: writing release summaries, drafting changelogs for end-users, summarizing what changed between tagged releases."
 tools: [read, search, execute, edit]
-model: claude-haiku-4-5
+model: claude-haiku-4.5
 ---
 
 <role>

.github/workflows/release.yml

@@ -184,7 +184,7 @@ jobs:
           BASE_TAG="${{ steps.last-published.outputs.tag }}"
           copilot -p "Generate a release summary. Base tag: ${BASE_TAG}, head tag: ${HEAD_TAG}. Summarize all changes between these two tags." \
             --agent=dev-relations \
-            --model=claude-haiku-4-5 \
+            --model=claude-haiku-4.5 \
             --available-tools='view,create,bash' \
             --allow-tool='shell(git:*)' \
             --allow-tool='create' \