app-admin/toolbox: fix the upstream default reference name

The upstream moved from "master" to "main" default branch which
needs to be reflected in the ebuild file.

BUG=b/189493262
TEST=presubmit
RELEASE_NOTE=None

Change-Id: I80f7fd4b63c5e21f2d80551cdf50de87161c2d53
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/17230
Reviewed-by: Roy Yang <royyang@google.com>
Reviewed-by: Vaibhav Rustagi <vaibhavrustagi@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
diff --git a/project-lakitu/app-admin/toolbox/toolbox-0.0.1-r25.ebuild b/project-lakitu/app-admin/toolbox/toolbox-0.0.1-r26.ebuild
similarity index 100%
rename from project-lakitu/app-admin/toolbox/toolbox-0.0.1-r25.ebuild
rename to project-lakitu/app-admin/toolbox/toolbox-0.0.1-r26.ebuild
diff --git a/project-lakitu/app-admin/toolbox/toolbox-0.0.1.ebuild b/project-lakitu/app-admin/toolbox/toolbox-0.0.1.ebuild
index caeb0fe..3ba27aa 100644
--- a/project-lakitu/app-admin/toolbox/toolbox-0.0.1.ebuild
+++ b/project-lakitu/app-admin/toolbox/toolbox-0.0.1.ebuild
@@ -8,6 +8,7 @@
 HOMEPAGE="https://github.com/coreos/toolbox"
 EGIT_REPO_URI="https://chromium.googlesource.com/external/github.com/coreos/toolbox.git"
 EGIT_COMMIT="a2767a0013c409a2381f7cdd4e31000b5fcded7e"
+EGIT_MASTER="main"
 
 inherit eutils git-2 systemd