ci: ensure that workflows run on main

Closes: diem#7871

.github/actions/land-blocking/find-lbt-images.sh

@@ -8,7 +8,7 @@ REPOS=(diem/validator diem/cluster_test diem/init diem/validator_tcb)
 # the number of commits backwards we want to look
 END=50
 
-BASE_REF=${BASE_REF:-master}
+BASE_REF=${BASE_REF:-main}
 
 image_tag_exists() {
     if [ -z $1 ]; then

.github/workflows/ci-update-sccache.yml

@@ -2,7 +2,7 @@ name: ci-update-sccache
 
 on:
   push:
-    branches: [master, release-*, gha-test-*]
+    branches: [main, master, release-*, gha-test-*]
 
 defaults:
   run:

.github/workflows/daily.yml

@@ -17,7 +17,7 @@ jobs:
       matrix:
         #this is a painful solution since it doesn't pick up new branches, other option is lotsa shell in one job....
         #to test in canary add in canary here.....
-        target-branch: [master, release-1.1]
+        target-branch: [main, master, release-1.1]
     env:
       MESSAGE_PAYLOAD_FILE: /tmp/message
     steps:

.github/workflows/developer-site-ci.yml

@@ -7,7 +7,7 @@ on:
     # paths: [ 'developers.diem.com/**' ]
     # but want to build rustdocs on main Diem code changes outside of the website too
   pull_request:
-    branches: [ master ]
+    branches: [ main, master ]
     # would have had
     # paths: [ 'developers.diem.com/**' ]
     # but want to build rustdocs on main Diem code changes outside of the website too

.github/workflows/docker-publish.yml

@@ -2,7 +2,7 @@ name: docker-publish.yml
 
 on:
   push:
-    branches: [master, release-*]
+    branches: [main, master, release-*]
 
 jobs:
   build-images:

.github/workflows/rustdoc.yml

@@ -2,7 +2,7 @@ name: rustdoc
 
 on:
   push:
-    branches: [ master ]
+    branches: [ main, master ]
 
 env:
   CARGO_INCREMENTAL: 0