Fix typo.

imports.md

@@ -300,7 +300,7 @@ all derived <a href="#pollable"><code>pollable</code></a>s created with this fun
 </ul>
 <h4><a name="method_output_stream.write_zeroes"><code>[method]output-stream.write-zeroes: func</code></a></h4>
 <p>Write zeroes to a stream.</p>
-<p>this should be used precisely like <code>write</code> with the exact same
+<p>This should be used precisely like <code>write</code> with the exact same
 preconditions (must use check-write first), but instead of
 passing a list of bytes, you simply pass the number of zero-bytes
 that should be written.</p>

wit/poll.wit

@@ -3,7 +3,7 @@ package wasi:[email protected];
 /// A poll API intended to let users wait for I/O events on multiple handles
 /// at once.
 interface poll {
-    /// `pollable` epresents a single I/O event which may be ready, or not.
+    /// `pollable` represents a single I/O event which may be ready, or not.
     resource pollable {
 
       /// Return the readiness of a pollable. This function never blocks.

wit/streams.wit

@@ -178,7 +178,7 @@ interface streams {
 
         /// Write zeroes to a stream.
         ///
-        /// this should be used precisely like `write` with the exact same
+        /// This should be used precisely like `write` with the exact same
         /// preconditions (must use check-write first), but instead of
         /// passing a list of bytes, you simply pass the number of zero-bytes
         /// that should be written.