Fix typo

Author: s-perron

llvm/docs/SPIRVUsage.rst

@@ -385,7 +385,7 @@ SPIR-V backend, along with their descriptions and argument details.
      - spirv.Image
      - `[32-bit Integer set, 32-bit Integer binding, 32-bit Integer arraySize, 32-bit Integer index, bool isUniformIndex]`
      - Returns the handle for the resource at the given set and binding.\
-       If `arraySize > 1`, then the binding represents and array of resources\
+       If `arraySize > 1`, then the binding represents an array of resources\
        of the given size, and the handle for the resource at the given index is returned.\
        If the index is possibly non-uniform, then `isUniformIndex` must get set to true.