Fix yamlint error

- Focus on indentation error
- Fix broken links in READMD

Change-Id: I37cca10f8d40f89b2b062c2e572772034ddcd09c
diff --git a/jjb/verify/voltha-api-server.yaml b/jjb/verify/voltha-api-server.yaml
index 9d0116c..3a80eca 100644
--- a/jjb/verify/voltha-api-server.yaml
+++ b/jjb/verify/voltha-api-server.yaml
@@ -24,7 +24,7 @@
           unit-test-keep-going: 'true'
           junit-allow-empty-results: true
       - 'voltha-patch-test':
-         pipeline: 'voltha-bbsim-tests.groovy'
+          pipeline: 'voltha-bbsim-tests.groovy'
 
 - job-group:
     name: 'publish-voltha-api-server-jobs'