ShellPkg: Rename duplicate STRING ID

There were 2 "STR_UCS2" strings.  This renames one of them so they are unique.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jaben Carsey <Jaben.carsey@intel.com>
Reviewed-by: Erik Bjorge <erik.c.bjorge@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14852 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Library/UefiHandleParsingLib/UefiHandleParsingLib.c

@@ -619,7 +619,7 @@ STATIC CONST GUID_INFO_BLOCK mGuidStringList[] = {
   {STRING_TOKEN(STR_KMS),                   &gEfiKmsProtocolGuid,                             NULL},
   {STRING_TOKEN(STR_BLK_IO2),               &gEfiBlockIo2ProtocolGuid,                        NULL},
   {STRING_TOKEN(STR_SSC),                   &gEfiStorageSecurityCommandProtocolGuid,          NULL},
-  {STRING_TOKEN(STR_UC2),                   &gEfiUserCredential2ProtocolGuid,                 NULL},
+  {STRING_TOKEN(STR_UCRED2),                &gEfiUserCredential2ProtocolGuid,                 NULL},
 
 //
 // UEFI 2.4