[css-page-floats] typo

Author: johanneswilm

css-page-floats/Overview.bs

@@ -944,7 +944,7 @@ canvas {
 Page floats with float references with fixed heights
 </h3>
 
-If a page floats are inside a float reference with a fixed height, the float
+If page floats are inside a float reference with a fixed height, the float
 reference is filled up until it cannot contain the following page float. All
 subsequent page floats are deferred to the next column/region/page.