Update Go version

Author: smoelius

.github/actions/install-testing-tools/action.yml

@@ -34,7 +34,7 @@ runs:
     - name: Install Go
       uses: actions/setup-go@v5
       with:
-        go-version: "^1.22.2"
+        go-version: "^1.25.1"
         cache: false
 
     # smoelius: The Chainlink Foundry test requires `node` and `pnpm`.