Bug 1581065 - Ride along: Fix two typos in the doc r=andi

Differential Revision: https://phabricator.services.mozilla.com/D45818

--HG--
extra : moz-landing-system : lando

gfx/docs/AdvancedLayers.rst

@@ -186,7 +186,7 @@ Clipping is a bit tricky in Advanced Layers. We cannot use the hardware
 within a batch. And if using the depth buffer, we cannot write
 transparent pixels for the clipped area. As a result we always clip
 opaque draw rects in the vertex shader (and sometimes even on the CPU,
-as is needed for sane texture coordiantes). Only transparent items are
+as is needed for sane texture coordinates). Only transparent items are
 clipped in the pixel shader. As a result, masked layers and layers with
 non-rectangular transforms are always considered transparent, and use a
 more flexible clipping pipeline.

taskcluster/docs/attributes.rst

@@ -247,7 +247,7 @@ artifact_prefix
 Most taskcluster artifacts are public, so we've hardcoded ``public/build`` in a
 lot of places. To support private artifacts, we've moved this to the
 ``artifact_prefix`` attribute. It will default to ``public/build`` but will be
-overrideable per-task.
+overridable per-task.
 
 artifact_map
 ===============