Create known-robots.txt
diff --git a/known-robots.txt b/known-robots.txt
new file mode 100644
index 0000000..5776b61
--- /dev/null
+++ b/known-robots.txt
@@ -0,0 +1,2 @@
+# This is a list of GitHub userIDs that are known to be bots
+codecov-commenter