[XRay] Fix typo in docs. NFC

Reviewers: dberris

Differential Revision: https://reviews.llvm.org/D40461

llvm-svn: 319047
diff --git a/llvm/docs/XRay.rst b/llvm/docs/XRay.rst
index 9e08c35..e9ecc13 100644
--- a/llvm/docs/XRay.rst
+++ b/llvm/docs/XRay.rst
@@ -75,11 +75,11 @@
 
 .. code-block:: c++
 
-    [[clang::xray_always_intrument]] void always_instrumented();
+    [[clang::xray_always_instrument]] void always_instrumented();
 
     [[clang::xray_never_instrument]] void never_instrumented();
 
-    void alt_always_instrumented() __attribute__((xray_always_intrument));
+    void alt_always_instrumented() __attribute__((xray_always_instrument));
 
     void alt_never_instrumented() __attribute__((xray_never_instrument));