Upgrade pulumi-go-provider (#268)

Fixes https://github.com/pulumi/pulumi-docker-build/issues/262.

@iwahbe I realized while putting this together that the provider config
case wasn't actually tested e2e, and I'm skeptical it was ever actually
working. I think it would be reasonable to pull in
https://github.com/pulumi/pulumi-docker-build/pull/253 IMO.

examples/tests/config/package.json

@@ -0,0 +1,9 @@
+{
+  "name": "test-buildx-caching",
+  "devDependencies": {
+    "@types/node": "^20.0.0"
+  },
+  "dependencies": {
+    "@pulumi/pulumi": "^3.128.0"
+  }
+}