Add a missing deps in the BUILD file
diff --git a/tools/render/BUILD b/tools/render/BUILD
index dd46504..62833b5 100644
--- a/tools/render/BUILD
+++ b/tools/render/BUILD
@@ -96,6 +96,7 @@
     deps = [
         ":render_program",
         "@com_google_absl//absl/flags:parse",
+        "@com_google_absl//absl/strings",
         "@com_google_glog//:glog",
     ],
 )