[fidl] Fix comment typos.

TEST: No behavior change
Change-Id: I0081b1bc9bfff1dab5860967a369679be0a198bb
diff --git a/system/ulib/fidl/include/lib/fidl/cpp/builder.h b/system/ulib/fidl/include/lib/fidl/cpp/builder.h
index bc394c5..cff84ac 100644
--- a/system/ulib/fidl/include/lib/fidl/cpp/builder.h
+++ b/system/ulib/fidl/include/lib/fidl/cpp/builder.h
@@ -18,7 +18,7 @@
 
 // Builder helps FIDL clients store decoded objects in a buffer.
 //
-// Objects are allocated sequentually in the buffer with appropriate alignment
+// Objects are allocated sequentially in the buffer with appropriate alignment
 // for in-place encoding. The client is responsible for ordering the objects in
 // the buffer appropriately.
 class Builder {
@@ -76,7 +76,7 @@
     //
     // The allocated objects are placed in the returned buffer in the order in
     // which they were allocated, with appropriate alignment for a FIDL message.
-    // The returned buffer's capacity cooresponds to the capacity originally
+    // The returned buffer's capacity corresponds to the capacity originally
     // provided to this builder in its constructor.
     BytePart Finalize();