Disable premerge for docs branches (#1028)

Author: Paul Balaji

.buildkite/premerge.definition.yaml

@@ -1,10 +1,13 @@
 ---
 agent_queue_id: trigger-pipelines
-description: Unity GDK pre-merge CI pipeline.
+description: GDK for Unity pre-merge CI pipeline.
 github:
   branch_configuration: []
   default_branch: develop
-  pull_request_branch_filter_configuration: []
+  pull_request_branch_filter_configuration:
+    - "!docs/*"
+    - "!docs-next"
+    - "!docs-current"
 teams:
 # TODO: normalise team names between orgs otherwise pipelines cannot coexist
 - name: Everyone

.buildkite/premerge.steps.yaml

@@ -61,7 +61,7 @@ steps:
       BUILD_TARGET_FILTER: "android"
       SCRIPTING_BACKEND: "mono"
 
-  - label: "build iOS"
+  - label: "build :ios:"
     command: bash -c .shared-ci/scripts/build-worker.sh
     <<: *common
     artifact_paths:

.buildkite/release-qa.steps.yaml

@@ -47,7 +47,7 @@ steps:
       BUILD_TARGET_FILTER: "android"
       SCRIPTING_BACKEND: "mono"
 
-  - label: "build iOS"
+  - label: "build :ios:"
     command: bash -c .shared-ci/scripts/build-worker.sh
     <<: *common
     artifact_paths: