Update actions/setup-go action to v6

Author: elastic-renovate-prod[bot]

.github/workflows/release-fleet.yml

@@ -173,7 +173,7 @@ jobs:
             git config --global user.name "tradebot-elastic"
 
         - name: Setup go
-          uses: actions/setup-go@be3c94b385c4f180051c996d336f57a34c397495 # v3
+          uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6
           with:
             go-version: '^1.20.1'
             check-latest: true