Fix list indentation inconsistencies (#202)

It is the predominant pattern in this repository to not indent list
elements in YAML files. I don't feel strongly whether we should or
should not have this pattern, but we should be consistent.

index.yaml

@@ -22,8 +22,8 @@ distributions:
       overlay: foxy/ci-overlay.yaml
     doc_builds: {}
     notification_emails:
-      - [email protected]
-      - [email protected]
+    - [email protected]
+    - [email protected]
     release_builds:
       default: foxy/release-build.yaml
       # TODO(jacobperron): reenable when focal issues are resolved
@@ -52,8 +52,8 @@ distributions:
       overlay: galactic/ci-overlay.yaml
     doc_builds: {}
     notification_emails:
-      - [email protected]
-      - [email protected]
+    - [email protected]
+    - [email protected]
     release_builds:
       default: galactic/release-build.yaml
       rhel: galactic/release-rhel-build.yaml
@@ -83,8 +83,8 @@ distributions:
     doc_builds:
       default: rolling/doc-build.yaml
     notification_emails:
-      - [email protected]
-      - [email protected]
+    - [email protected]
+    - [email protected]
     release_builds:
       default: rolling/release-build.yaml
       rhel: rolling/release-rhel-build.yaml
@@ -93,7 +93,7 @@ distributions:
       default: rolling/source-build.yaml
 jenkins_url: https://build.ros2.org
 notification_emails:
-  - [email protected]
+- [email protected]
 prerequisites:
   debian_repositories:
   - http://repo.ros2.org/ubuntu/building
@@ -164,12 +164,12 @@ prerequisites:
 rosdistro_index_url: https://raw.githubusercontent.com/ros/rosdistro/master/index-v4.yaml
 status_page_repositories:
   default:
-    - http://repo.ros2.org/ubuntu/building
-    - http://repo.ros2.org/ubuntu/testing
-    - http://repo.ros2.org/ubuntu/main
+  - http://repo.ros2.org/ubuntu/building
+  - http://repo.ros2.org/ubuntu/testing
+  - http://repo.ros2.org/ubuntu/main
   rhel:
-    - http://repo.ros2.org/rhel/building
-    - http://repo.ros2.org/rhel/testing
-    - http://repo.ros2.org/rhel/main
+  - http://repo.ros2.org/rhel/building
+  - http://repo.ros2.org/rhel/testing
+  - http://repo.ros2.org/rhel/main
 type: buildfarm
 version: 1

rolling/ci-clang-tidy.yaml

@@ -82,14 +82,14 @@ repositories:
   - http://repo.ros2.org/ubuntu/testing
   - http://repositories.ros.org/ubuntu/testing
 skip_rosdep_keys:
-  - composition
-  - demo_nodes_py
-  - ikos
-  - lifecycle
-  - rmw_connextdds
-  - rmw_fastrtps_cpp
-  - rmw_fastrtps_dynamic_cpp
-  - rosidl_typesupport_fastrtps_c
+- composition
+- demo_nodes_py
+- ikos
+- lifecycle
+- rmw_connextdds
+- rmw_fastrtps_cpp
+- rmw_fastrtps_dynamic_cpp
+- rosidl_typesupport_fastrtps_c
 targets:
   ubuntu:
     focal: