docs: fix file path (#11175)

Signed-off-by: Alyssa Wilk <alyssar@chromium.org>

docs/root/intro/arch_overview/http/upgrades.rst

@@ -97,8 +97,8 @@ An example set up proxying SMTP would look something like this
 [SMTP Upstream] --- raw SMTP --- [L2 Envoy] --- SMTP tunneled over HTTP/2 --- [L1 Envoy] --- raw SMTP --- [Client]
 
 Examples of such a set up can be found in the Envoy example config :repo:`directory <configs/>`
-If you run `bazel-bin/source/exe/envoy-static --config-path configs/encapsulate_in_connect.yaml --base-id 1`
-and `bazel-bin/source/exe/envoy-static --config-path configs/terminate_connect.yaml`
+If you run `bazel-bin/source/exe/envoy-static --config-path configs/encapsulate_in_connect.v3.yaml --base-id 1`
+and `bazel-bin/source/exe/envoy-static --config-path configs/terminate_connect.v3.yaml`
 you will be running two Envoys, the first listening for TCP traffic on port 10000 and encapsulating it in an HTTP/2
 CONNECT request, and the second listening for HTTP/2 on 10001, stripping the CONNECT headers, and forwarding the
 original TCP upstream, in this case to google.com.