Migration from master to main.

Change-Id: I675e4fdb91b4eb099f487830cfe3c67075113abf
Reviewed-on: https://code-review.googlesource.com/c/re2/+/58770
Reviewed-by: Paul Wankadia <junyer@google.com>
diff --git a/.github/workflows/ci-bazel.yml b/.github/workflows/ci-bazel.yml
index 534da03..681034d 100644
--- a/.github/workflows/ci-bazel.yml
+++ b/.github/workflows/ci-bazel.yml
@@ -1,7 +1,7 @@
 name: CI (Bazel)
 on:
   push:
-    branches: [master]
+    branches: [main]
 jobs:
   build:
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/ci-cmake.yml b/.github/workflows/ci-cmake.yml
index 568312e..585c386 100644
--- a/.github/workflows/ci-cmake.yml
+++ b/.github/workflows/ci-cmake.yml
@@ -1,7 +1,7 @@
 name: CI (CMake)
 on:
   push:
-    branches: [master]
+    branches: [main]
 jobs:
   build:
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 09d1687..474cf65 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,7 +1,7 @@
 name: CI
 on:
   push:
-    branches: [master]
+    branches: [main]
 jobs:
   build:
     runs-on: ${{ matrix.os }}
diff --git a/WORKSPACE b/WORKSPACE
index 484abfe..ec1292e 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -10,6 +10,6 @@
 
 http_archive(
     name = "rules_cc",
-    strip_prefix = "rules_cc-master",
-    urls = ["https://github.com/bazelbuild/rules_cc/archive/master.zip"],
+    strip_prefix = "rules_cc-main",
+    urls = ["https://github.com/bazelbuild/rules_cc/archive/main.zip"],
 )