[chore] Fix wrong instruction on non-normative http-migration guide (#1850)

Co-authored-by: Trask Stalnaker <trask.stalnaker@gmail.com>
Co-authored-by: Liudmila Molkova <limolkova@microsoft.com>

docs/non-normative/http-migration.md

@@ -122,8 +122,8 @@ Metric changes:
 
 - **Name**: `http.client.duration` → `http.client.request.duration`
 - **Unit**: `ms` → `s`
-- **Description**: `Measures the duration of inbound HTTP requests.` →
-  `Duration of HTTP server requests.`
+- **Description**: `Measures the duration of outbound HTTP requests.` →
+  `Duration of HTTP client requests.`
 - **Histogram buckets**: boundaries updated to reflect change from milliseconds
   to seconds, and zero bucket boundary removed
 - **Attributes**: see table below