Fix typo in closing tag for some code blocks (#3196)

Author: kimsondrup

mesh/v1alpha1/istio.mesh.v1alpha1.pb.html

@@ -680,7 +680,7 @@ message ProxyConfig {
     // If disabled, this header will not be set. If it is already present, it will be preserved.
     // This header is enabled by default if not configured.
     AttemptCount attempt_count = 4;
-    // Controls various `X-Envoy-*` headers, such as `X-Envoy-Overloaded` and `X-Envoy-Upstream-Service-Time. If enabled,
+    // Controls various `X-Envoy-*` headers, such as `X-Envoy-Overloaded` and `X-Envoy-Upstream-Service-Time`. If enabled,
     // these headers will be included.
     // If disabled, these headers will not be set. If they are already present, they will be preserved.
     // See the [Envoy documentation](https://www.envoyproxy.io/docs/envoy/latest/api-v3/extensions/filters/http/router/v3/router.proto#envoy-v3-api-field-extensions-filters-http-router-v3-router-suppress-envoy-headers) for more details.

mesh/v1alpha1/proxy.pb.go

@@ -526,8 +526,8 @@ message Operation {
   // - `/foo/{*}` matches `/foo/bar` but not `/foo/bar/baz`
   // - `/foo/{**}/` matches `/foo/bar/`, `/foo/bar/baz.txt`, and `/foo//` but not `/foo/bar`
   // - `/foo/{*}/bar/{**}` matches `/foo/buzz/bar/` and `/foo/buzz/bar/baz`
-  // - `/*/baz/{*}`` is not a valid path template since it includes `*` outside of a supported operator
-  // - `/**/baz/{*}`` is not a valid path template since it includes `**` outside of a supported operator
+  // - `/*/baz/{*}` is not a valid path template since it includes `*` outside of a supported operator
+  // - `/**/baz/{*}` is not a valid path template since it includes `**` outside of a supported operator
   // - `/{**}/foo/{*}` is not a valid path template since `{**}` is not the last operator
   // - `/foo/{*}.txt` is invalid since there are characters other than `{*}` in the path segment
   //