Fix a typo in interceptor example's README.md (#4014)
diff --git a/examples/features/interceptor/README.md b/examples/features/interceptor/README.md
index 1e74b28..8498fbe 100644
--- a/examples/features/interceptor/README.md
+++ b/examples/features/interceptor/README.md
@@ -76,7 +76,7 @@
In the example, we define a new struct `wrappedStream`, which is embedded with a
`ClientStream`. Then, we implement (overload) the `SendMsg` and `RecvMsg`
-methods on `wrappedStream` to intercepts these two operations on the embedded
+methods on `wrappedStream` to intercept these two operations on the embedded
`ClientStream`. In the example, we log the message type info and time info for
interception purpose.
