ci(workflows): fix jq selector for AI release notes

Update response path from .choices[0].text to
.output[1].content[0].text to match API response schema and
restore successful notes generation

.gitea/workflows/multi-platform.yml

@@ -112,8 +112,8 @@ jobs:
               }")
 
             # Check if the API call was successful and extract the response
-            if echo "$RESPONSE" | jq -e '.choices[0].text' > /dev/null 2>&1; then
-              echo "$RESPONSE" | jq -r '.choices[0].text' > release_notes.md
+            if echo "$RESPONSE" | jq -e '.output[1].content[0].text' > /dev/null 2>&1; then
+              echo "$RESPONSE" | jq -r '.output[1].content[0].text' > release_notes.md
               echo "Generated AI release notes successfully"
             else
               echo "AI generation failed, falling back to simple notes"