[Autoroller] Fix github label typo

This stuck around for way too long..

Bug: skia:9146
Change-Id: I40d7c6be6ba0291b38a67fb89fbf2b62e9a2eee4
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/218545
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
diff --git a/go/github/github.go b/go/github/github.go
index d29ac50..b4a50d7 100644
--- a/go/github/github.go
+++ b/go/github/github.go
@@ -43,7 +43,7 @@
 	MERGEABLE_STATE_UNSTABLE = "unstable" // Failing or pending commit status.
 
 	COMMIT_LABEL = "autoroller: commit"
-	DRYRUN_LABEL = "autoroller: dyrun"
+	DRYRUN_LABEL = "autoroller: dryrun"
 
 	CHECK_STATE_PENDING = "pending"
 	CHECK_STATE_SUCCESS = "success"