Merge cockroachdb#24672

24672: cherrypick-1.1: give craig an avatar, move bors.toml into .github r=couchand a=couchand

build: give craig an avatar

At present, when GitHub apps create commits, they don't show up
with the app's avatar.  A workaround is to commit with an e-mail
address that has an associated gravatar.

build: move bors.toml into .github folder

Just to keep the root of the project a little cleaner.

---

I hadn't planned on cherry-picking this, but figured it's a reasonable test that the branch protection is set up correctly.

cc: @cockroachdb/release @jordanlewis 

Co-authored-by: Andrew Couch <[email protected]>

bors.toml → .github/bors.toml

@@ -7,3 +7,7 @@ pr_status = [
 block_labels = [
   "do-not-merge"
 ]
+
+[committer]
+name = "craig[bot]"
+email = "[email protected]"