Fix markdown in SPIR-V.rst (#7112)

Fix markdown syntax in a few places. They shown incorrectly on github

Author: Vovan675

docs/SPIR-V.rst

@@ -3967,7 +3967,7 @@ RayQuery Mapping to SPIR-V
 +---------------------------------------------------+-------------------------------------------------------------------------+
 |``.WorldRayDirection``                             | ``OpRayQueryGetWorldRayDirectionKHR``                                   |
 +---------------------------------------------------+-------------------------------------------------------------------------+
-|``.WorldRayOrigin`                                 | ``OpRayQueryGetWorldRayOriginKHR``                                      |
+|``.WorldRayOrigin``                                | ``OpRayQueryGetWorldRayOriginKHR``                                      |
 +---------------------------------------------------+-------------------------------------------------------------------------+
 
 Shader Model 6.0+ Wave Intrinsics