Fix indentation

Fix rendering.

Author: martincostello

docs/migration.md

@@ -12,18 +12,18 @@ OpenTelemetry .NET project.
 - Setup the OTLP exporter for metrics, logs, and traces - see the
   [exporter README][exporter-readme] for details. The exporter will respect the
   previously set environment variables:
-      - `OTEL_EXPORTER_OTLP_PROTOCOL`
-      - `OTEL_EXPORTER_OTLP_ENDPOINT`
-      - `OTEL_EXPORTER_OTLP_HEADERS`
+    - `OTEL_EXPORTER_OTLP_PROTOCOL`
+    - `OTEL_EXPORTER_OTLP_ENDPOINT`
+    - `OTEL_EXPORTER_OTLP_HEADERS`
 - Install and configure any desired instrumentation packages
   [listed here](./supported-instrumentations.md)
 - [Add the OpenTelemetry resource attributes][resource-attributes]
   via the `OTEL_RESOURCE_ATTRIBUTES` environment variable
-      - `service.name`
-      - `service.namespace`
-      - `service.instance.id`
-      - `service.version`
-      - `deployment.environment`
+    - `service.name`
+    - `service.namespace`
+    - `service.instance.id`
+    - `service.version`
+    - `deployment.environment`
 
 ```shell
 export OTEL_RESOURCE_ATTRIBUTES=service.instance.id=<pod123>,deployment.environment=...