fix(ci): explicitly push before creating PR

Author: rymnc

.github/workflows/nightly-benchmark.yml

@@ -70,7 +70,8 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - run: |
+      - name: Parse benchmark results and create PR
+        run: |
           jq --argjson benchmark_results "$benchmark_results" \
             '.consensus_parameters.${{ env.CONSENSUS_PARAMETERS_VERSION }}.gas_costs = $benchmark_results' \
             bin/fuel-core/chainspec/local-testnet/chain_config.json > \
@@ -83,6 +84,9 @@ jobs:
           git config user.name 'github-actions[bot]'
           git config user.email 'github-actions[bot]@users.noreply.github.com'
           git commit -m "Update benchmark results"
+
+          git push origin "$branch_name"
+
           # create a new PR
           gh pr create \
             --title "chore(gas_costs): update local chain config with nightly benchmark results" \