chore: update doc links to point to new directories (numaproj#1815)

Signed-off-by: a3hadi <a3hadi@protonmail.com>

docs/user-guide/reference/side-inputs.md

@@ -72,7 +72,7 @@ func handle(_ context.Context) sideinputsdk.Message {
     return sideinputsdk.BroadcastMessage([]byte(val))
 }
 ```
-Similarly, this can be written in [Python](https://github.com/numaproj/numaflow-python/blob/main/examples/sideinput/simple-sideinput/example.py) 
+Similarly, this can be written in [Python](https://github.com/numaproj/numaflow-python/blob/main/examples/sideinput/simple_sideinput/example.py) 
 and [Java](https://github.com/numaproj/numaflow-java/blob/main/examples/src/main/java/io/numaproj/numaflow/examples/sideinput/simple/SimpleSideInput.java) as well.
 
 After performing the retrieval/update, the side input value is then broadcasted to all vertices that use the side input.
@@ -104,6 +104,6 @@ sideInputFileName -> "/var/numaflow/side-inputs/sideInputName"
 ```
 
 Here are some examples of watching the side input filesystem for changes in 
-[Golang](https://github.com/numaproj/numaflow-go/blob/main/pkg/sideinput/examples/simple-sideinput/udf/main.go), 
-[Python](https://github.com/numaproj/numaflow-python/blob/main/examples/sideinput/simple-sideinput/udf/example.py) and 
+[Golang](https://github.com/numaproj/numaflow-go/blob/main/pkg/sideinput/examples/simple_sideinput/udf/main.go), 
+[Python](https://github.com/numaproj/numaflow-python/blob/main/examples/sideinput/simple_sideinput/udf/example.py) and 
 [Java](https://github.com/numaproj/numaflow-java/tree/main/examples/src/main/java/io/numaproj/numaflow/examples/sideinput/udf).