[mlir][bazel] remove extra blanks in mlir-tblgen test

Author: yijia1212

utils/bazel/llvm-project-overlay/mlir/test/mlir-tblgen/BUILD.bazel

@@ -28,7 +28,7 @@ package(default_visibility = ["//visibility:public"])
             "//mlir:include/mlir/Dialect/OpenMP/OpenMPTypeInterfaces.td",
             "//mlir:include/mlir/IR/BuiltinAttributeInterfaces.td",
             "//mlir:include/mlir/IR/BuiltinAttributes.td",
-            "//mlir:include/mlir/IR/BuiltinDialect.td",	    
+            "//mlir:include/mlir/IR/BuiltinDialect.td",
             "//mlir:include/mlir/IR/BuiltinDialectBytecode.td",
             "//mlir:include/mlir/IR/BytecodeBase.td",
             "//mlir:include/mlir/IR/OpBase.td",