[bindings] add direction to component yaml (#894)

* update to best practice

Signed-off-by: Hannah Hunter <hannahhunter@microsoft.com>

* fix link

Signed-off-by: Hannah Hunter <hannahhunter@microsoft.com>

---------

Signed-off-by: Hannah Hunter <hannahhunter@microsoft.com>

bindings/components/binding-cron.yaml

@@ -9,3 +9,5 @@ spec:
   metadata:
   - name: schedule
     value: "@every 10s" # valid cron schedule
+  - name: direction
+    value: "input"

bindings/components/binding-postgres.yaml

@@ -9,3 +9,5 @@ spec:
   metadata:
   - name: url # Required
     value: "user=postgres password=docker host=localhost port=5432 dbname=orders pool_min_conns=1 pool_max_conns=10"
+  - name: direction
+    value: "output"

tutorials/observability/README.md

@@ -1,6 +1,6 @@
 # Observability with Dapr
 
-This quickstart explores the [observability](https://docs.dapr.io/concepts/observability-concept/) capabilities of Dapr. Observability includes metric collection, tracing, logging and health checks. In this quickstart you'll be enabling [distributed tracing](https://docs.dapr.io/developing-applications/building-blocks/observability/tracing-overview/) on an application without changing any application code or creating a dependency on any specific tracing system. Since Dapr uses [OpenCensus](https://opencensus.io/), a variety of observability tools can be used to view and capture the traces.
+This quickstart explores the [observability](https://docs.dapr.io/concepts/observability-concept/) capabilities of Dapr. Observability includes metric collection, tracing, logging and health checks. In this quickstart you'll be enabling [distributed tracing](https://docs.dapr.io/developing-applications/building-blocks/observability/develop-tracing/tracing-overview/) on an application without changing any application code or creating a dependency on any specific tracing system. Since Dapr uses [OpenCensus](https://opencensus.io/), a variety of observability tools can be used to view and capture the traces.
 
 In this quickstart you will:
 
@@ -543,7 +543,7 @@ kubectl delete -f deploy/zipkin.yaml
 ## Additional Resources
 
 - Learn more about [observability](https://docs.dapr.io/concepts/observability-concept/).
-- Learn more on how Dapr does [distributed tracing](https://docs.dapr.io/developing-applications/building-blocks/observability/tracing-overview/).
+- Learn more on how Dapr does [distributed tracing](https://docs.dapr.io/developing-applications/building-blocks/observability/develop-tracing/tracing-overview/).
 
 ## Next steps