Update README.md - fix anchor link (#36903)

Just a small change to fix a broken link to an anchor in the readme.

connector/routingconnector/README.md

@@ -39,7 +39,7 @@ The `match_once` field is deprecated as of `v0.116.0`. The deprecation schedule
 
 It is recommended to set `match_once: true` until `v0.117.0` and then remove all usage of the field before `v0.120.0`.
 
-For detailed guidance on how to migrate configuration from `match_once: false` to `match_once: true`, see [Config Migration](#config-migration.md).
+For detailed guidance on how to migrate configuration from `match_once: false` to `match_once: true`, see [Config Migration](#config-migration).
 
 ## Configuration
 
@@ -460,4 +460,4 @@ service:
 [Connectors README]:https://github.com/open-telemetry/opentelemetry-collector/blob/main/connector/README.md
 
 [OTTL]: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/pkg/ottl/README.md
-[OTTL Context]: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/pkg/ottl/LANGUAGE.md#contexts
+[OTTL Context]: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/pkg/ottl/LANGUAGE.md#contexts