chore: update readme

example/otlp-traces-http/README.md

@@ -0,0 +1,19 @@
+# Configuring OTLP traces exporter for Uptrace
+
+This example shows how to configure
+[OTLP](https://opentelemetry-python.readthedocs.io/en/latest/exporter/otlp/otlp.html) to export
+traces to Uptrace using HTTP transport.
+
+Install dependencies:
+
+```shell
+pip install -r requirements.txt
+```
+
+To run this example, you need to
+[create an Uptrace project](https://uptrace.dev/get/get-started.html) and pass your project DSN via
+`UPTRACE_DSN` env variable:
+
+```go
+UPTRACE_DSN=https://<token>@api.uptrace.dev/<project_id> ./main.py
+```

example/otlp-traces/README.md

@@ -2,7 +2,7 @@
 
 This example shows how to configure
 [OTLP](https://opentelemetry-python.readthedocs.io/en/latest/exporter/otlp/otlp.html) to export
-traces to Uptrace.
+traces to Uptrace using gRPC transport.
 
 Install dependencies: