chore: update pr-agent to 0.26

Author: dbarrosop

.github/workflows/gen_ai_review.yaml

@@ -16,7 +16,7 @@ jobs:
     steps:
       - name: PR Agent action step
         id: pragent
-        uses: Codium-ai/pr-agent@v0.24
+        uses: Codium-ai/pr-agent@v0.26
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           OPENAI_KEY: ${{ secrets.OPENAI_API_KEY }}