use pkg.go.dev instead of godoc.org on overview

Author: AndersonQ

.doc/overview.asciidoc

@@ -5,7 +5,7 @@ This is the official Go client for {es}.
 
 Full documentation is hosted at 
 https://github.com/elastic/go-elasticsearch[GitHub]
-and https://godoc.org/github.com/elastic/go-elasticsearch[GoDoc]. This 
+and https://pkg.go.dev/github.com/elastic/go-elasticsearch[PkgGoDev]. This 
 documentation provides only an overview of features.
 
 [discrete]
@@ -64,4 +64,4 @@ Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
-limitations under the License.
+limitations under the License.