s/product-services/product_services/g

Attempting to reduce the number of different spellings we have for
"product services" partition in the codebase.

Bug: 112431447
Test: m
Change-Id: I6debd3f5f5abc4bd1e22f2ef11c5fe131915976c
Merged-In: I6debd3f5f5abc4bd1e22f2ef11c5fe131915976c
diff --git a/help.sh b/help.sh
index 3ecdbc2..be07344 100755
--- a/help.sh
+++ b/help.sh
@@ -40,7 +40,7 @@
                             Stands for "Vendor, NO Dependencies"
     pnod                    Quickly rebuild the product image from built packages
                             Stands for "Product, NO Dependencies"
-    psnod                   Quickly rebuild the product-services image from built packages
+    psnod                   Quickly rebuild the product_services image from built packages
                             Stands for "ProductServices, NO Dependencies"
     onod                    Quickly rebuild the odm image from built packages
                             Stands for "ODM, NO Dependencies"