Fix old style writing identified by CI

Author: oddhack

chapters/VK_EXT_present_timing/queries.adoc

@@ -311,7 +311,7 @@ be atomic within the implementation.
     is set in sname:VkPastPresentationTimingInfoEXT::pname:flags, the
     pname:presentStageCount value of each element of
     sname:VkPastPresentationTimingPropertiesEXT::pname:pPresentationTimings
-    must: be set to at least the maximum number of present stages set in
+    must: be at least the maximum number of present stages set in
     slink:VkPresentTimingInfoEXT::pname:presentStageQueries among all
     flink:vkQueuePresentKHR calls, with a non-zero
     pname:presentStageQueries, for which complete results have not been
@@ -320,7 +320,7 @@ be atomic within the implementation.
     is not set in sname:VkPastPresentationTimingInfoEXT::pname:flags, the
     pname:presentStageCount value of each element of
     sname:VkPastPresentationTimingPropertiesEXT::pname:pPresentationTimings
-    must: be set to at least the number of present stages set in
+    must: be at least the number of present stages set in
     sname:VkPresentTimingInfoEXT::pname:presentStageQueries for the earliest
     call to fname:vkQueuePresentKHR, with a non-zero
     pname:presentStageQueries, that corresponds to that element's index and