change master to main

Author: gaohannk

prow/prowjobs/GoogleCloudPlatform/gcp-guest/gcp-guest-config.yaml

@@ -33,7 +33,7 @@ postsubmits:
     extra_refs:
     - org: GoogleCloudPlatform
       repo: guest-test-infra
-      base_ref: master
+      base_ref: main
       workdir: true
     decorate: true
     branches:
@@ -56,7 +56,7 @@ postsubmits:
     extra_refs:
     - org: GoogleCloudPlatform
       repo: guest-test-infra
-      base_ref: master
+      base_ref: main
       workdir: true
     decorate: true
     branches:
@@ -82,7 +82,7 @@ presubmits:
     extra_refs:
     - org: GoogleCloudPlatform
       repo: guest-test-infra
-      base_ref: master
+      base_ref: main
       workdir: true
     trigger: "(?m)^/packagebuild$"
     rerun_command: "/packagebuild"
@@ -105,7 +105,7 @@ presubmits:
     extra_refs:
     - org: GoogleCloudPlatform
       repo: guest-test-infra
-      base_ref: master
+      base_ref: main
       workdir: true
     trigger: "(?m)^/packagebuild$"
     rerun_command: "/packagebuild"
@@ -167,7 +167,7 @@ presubmits:
     extra_refs:
     - org: GoogleCloudPlatform
       repo: guest-test-infra
-      base_ref: master
+      base_ref: main
       workdir: true
     trigger: "(?m)^/packagebuild$"
     rerun_command: "/packagebuild"
@@ -190,7 +190,7 @@ presubmits:
     extra_refs:
     - org: GoogleCloudPlatform
       repo: guest-test-infra
-      base_ref: master
+      base_ref: main
       workdir: true
     trigger: "(?m)^/packagebuild$"
     rerun_command: "/packagebuild"
@@ -217,7 +217,7 @@ presubmits:
     extra_refs:
     - org: GoogleCloudPlatform
       repo: guest-test-infra
-      base_ref: master
+      base_ref: main
       workdir: true
     decorate: true
     labels:
@@ -356,7 +356,7 @@ presubmits:
     extra_refs:
     - org: GoogleCloudPlatform
       repo: guest-test-infra
-      base_ref: master
+      base_ref: main
       workdir: true
     decorate: true
     labels:
@@ -419,7 +419,7 @@ presubmits:
     extra_refs:
     - org: GoogleCloudPlatform
       repo: guest-test-infra
-      base_ref: master
+      base_ref: main
       workdir: true
     decorate: true
     labels: