ci: Update the default branch name

library/compiler-builtins/.github/workflows/main.yaml

@@ -1,6 +1,6 @@
 name: CI
 on:
-  push: { branches: [master] }
+  push: { branches: [main] }
   pull_request:
 
 concurrency:

library/compiler-builtins/PUBLISHING.md

@@ -5,7 +5,7 @@ It's not great, but it works for now. PRs to improve this process would be
 greatly appreciated!
 
 1. Make sure you've got a clean working tree and it's updated with the latest
-   changes on `master`
+   changes on `main`
 2. Edit `Cargo.toml` to bump the version number
 3. Commit this change
 4. Run `git tag` to create a tag for this version

library/compiler-builtins/ci/bench-icount.sh

@@ -15,7 +15,7 @@ iai_home="iai-home"
 # Use the arch as a tag to disambiguate artifacts
 tag="$(echo "$target" | cut -d'-' -f1)"
 
-# Download the baseline from master
+# Download the baseline from main
 ./ci/ci-util.py locate-baseline --download --extract --tag "$tag"
 
 # Run benchmarks once

library/compiler-builtins/ci/ci-util.py

@@ -49,7 +49,7 @@ USAGE = cleandoc(
 
 REPO_ROOT = Path(__file__).parent.parent
 GIT = ["git", "-C", REPO_ROOT]
-DEFAULT_BRANCH = "master"
+DEFAULT_BRANCH = "main"
 WORKFLOW_NAME = "CI"  # Workflow that generates the benchmark artifacts
 ARTIFACT_PREFIX = "baseline-icount*"
 
@@ -186,7 +186,7 @@ class Context:
 
     def _init_change_list(self):
         """Create a list of files that have been changed. This uses GITHUB_REF if
-        available, otherwise a diff between `HEAD` and `master`.
+        available, otherwise a diff between `HEAD` and `main`.
         """
 
         # For pull requests, GitHub creates a ref `refs/pull/1234/merge` (1234 being