Update create-pull-request version (#466)

Github action not working. Trying updating the version to see if that fixes things.

Author: sderickson

.github/workflows/spec_update.yml

@@ -51,7 +51,7 @@ jobs:
           pip install -r requirements.txt
           python generate_base_client.py
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v3.8.2
+        uses: peter-evans/create-pull-request@v5.0.0
         if: steps.git-diff-num.outputs.num-diff != 0
         with:
           token: ${{ secrets.SPEC_UPDATE_TOKEN }}