chore: replace master with main in documentation URLs

Signed-off-by: Luca Muscariello <muscariello@ieee.org>

Author: muscariello

.git-blame-ignore-revs

@@ -1,4 +1,4 @@
-# Template taken from https://github.com/v8/v8/blob/master/.git-blame-ignore-revs.
+# Template taken from https://github.com/v8/v8/blob/main/.git-blame-ignore-revs.
 #
 # This file contains a list of git hashes of revisions to be ignored by git blame. These
 # revisions are considered "unimportant" in that they are unlikely to be what you are

CODE_OF_CONDUCT.md

@@ -93,4 +93,4 @@ available at
 https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
 
 Note: A version of this file is also available in the
-[New Project repository](https://github.com/google/new-project/blob/master/docs/code-of-conduct.md).
+[New Project repository](https://github.com/google/new-project/blob/main/docs/code-of-conduct.md).