RISC-V: Update ratified 'Ztso' extension version

Because the 'Ztso' extension is now ratified, it has a version number of 1.0
(not 0.1).  This commit updates the number.

bfd/ChangeLog:

	* elfxx-riscv.c (riscv_supported_std_z_ext): Update the version
	number of the 'Ztso' extension since it's ratified.

Author: a4lg

bfd/elfxx-riscv.c

@@ -1317,7 +1317,7 @@ static struct riscv_supported_ext riscv_supported_std_z_ext[] =
   {"zvl16384b",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zvl32768b",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zvl65536b",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
-  {"ztso",		ISA_SPEC_CLASS_DRAFT,		0, 1,  0 },
+  {"ztso",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zca",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zcb",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zcf",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },