spelling: synthetic

Signed-off-by: Josh Soref <[email protected]>

receiver/httpcheckreceiver/README.md

@@ -13,7 +13,7 @@
 [k8s]: https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol-k8s
 <!-- end autogenerated section -->
 
-The HTTP Check Receiver can be used for synthethic checks against HTTP endpoints. This receiver will make a request to the specified `endpoint` using the
+The HTTP Check Receiver can be used for synthetic checks against HTTP endpoints. This receiver will make a request to the specified `endpoint` using the
 configured `method`. This scraper generates a metric with a label for each HTTP response status class with a value of `1` if the status code matches the
 class. For example, the following metrics will be generated if the endpoint returned a `200`: