Update note for shieldtablet to reflect new builds not supporting
older bootloaders.

Change-Id: I8a6f292ae32c2d84533ce1eeba1af731b510b8ed
diff --git a/_devices/nvidiahshieldtablet.markdown b/_devices/nvidiahshieldtablet.markdown
index 8f5dded..fb373c6 100644
--- a/_devices/nvidiahshieldtablet.markdown
+++ b/_devices/nvidiahshieldtablet.markdown
@@ -17,7 +17,7 @@
 
 <div class='page-heading'>Notes:</div>
 <hr />
-<p class="text">Releases 3.0.2-0 and before are for the 'L' bootloader only. Later versions work on all models and bootloaders.</p>
+<p class="text">Releases 3.0.2-0 and before are for the 'L' bootloader only. 3.0.2-1 through 3.1.1-0 are for L through N bootloaders. Later versions only work on the M/N bootloaders.</p>
 
 {% include appinstall.html %}