Fix typo in a comment

Change-Id: I85aa498e6f593567b361f01734af1e8eb586ceba
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/64080
Auto-Submit: David Neto <dneto@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
diff --git a/src/writer/spirv/builder.cc b/src/writer/spirv/builder.cc
index 1610463..afe2bbc 100644
--- a/src/writer/spirv/builder.cc
+++ b/src/writer/spirv/builder.cc
@@ -89,7 +89,7 @@
   return !stmts->empty() && stmts->last()->Is<ast::FallthroughStatement>();
 }
 
-// A terminator is anything which will case a SPIR-V terminator to be emitted.
+// A terminator is anything which will cause a SPIR-V terminator to be emitted.
 // This means things like breaks, fallthroughs and continues which all emit an
 // OpBranch or return for the OpReturn emission.
 bool LastIsTerminator(const ast::BlockStatement* stmts) {