Update git submodules

* Update plugins/delete-project from branch 'stable-3.9'
  to 48754950c0f7781aaf169fef378e595e7d822e3a
  - Change from h2 to h3
    
    Change-Id: I21f606f1b96f80a1250426c834c41fbb3d8d2615
    (cherry picked from commit bd49c1bf4212a166d1246774cb8c70d54ead31ba)
    
diff --git a/plugins/delete-project b/plugins/delete-project
index 9303850..4875495 160000
--- a/plugins/delete-project
+++ b/plugins/delete-project
@@ -1 +1 @@
-Subproject commit 93038507ff113042bf09ba96d788af43a5deff28
+Subproject commit 48754950c0f7781aaf169fef378e595e7d822e3a