dlcservice: Remove use of offensive term from codebase

Remove use of "dummy".

BUG=b:170963049
TEST=none

Cq-Depend: chromium:2476595
Change-Id: Id710b1cbfb231d7f36dafe5f011698c6839b1992
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2476819
Tested-by: Jae Hoon Kim <kimjae@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Commit-Queue: Jae Hoon Kim <kimjae@chromium.org>
diff --git a/dlcservice/docs/developer.md b/dlcservice/docs/developer.md
index 043e7e6..2752ccb 100644
--- a/dlcservice/docs/developer.md
+++ b/dlcservice/docs/developer.md
@@ -108,7 +108,7 @@
 that before installing any DLC files, you have to add the dlc prefix path to
 `into, insinto` and `exeinto` using `$(dlc_add_path your_path)`.
 
-See an example of a DLC ebuild: [dummy-dlc]
+See an example of a DLC ebuild: [sample-dlc]
 
 ## Write platform code to request DLC
 
@@ -178,5 +178,5 @@
 [imageloader_impl.cc]: https://chromium.googlesource.com/chromiumos/platform2/+/HEAD/imageloader/imageloader_impl.cc
 [tast]: go/tast
 [tast-deps]: go/tast-deps
-[dummy-dlc]: https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/HEAD/chromeos-base/dummy-dlc/dummy-dlc-1.0.0.ebuild
+[sample-dlc]: https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/HEAD/chromeos-base/sample-dlc/sample-dlc-1.0.0.ebuild
 [overlay-eve make.defaults]: https://chromium.googlesource.com/chromiumos/overlays/board-overlays/+/HEAD/overlay-eve/profiles/base/make.defaults