Fix the name of RETURNCONTRACT instruction in EOF assembly output (#15729)

* Fix RETURNCONTRACT instruction in AssemblyItem.cpp

---------

Co-authored-by: r0qs <rodrigo.saramago@ethereum.org>

Author: sky-coderay

libevmasm/AssemblyItem.cpp

@@ -393,7 +393,7 @@ std::string AssemblyItem::toAssemblyText(Assembly const& _assembly) const
 		text = "eofcreate{" +  std::to_string(static_cast<size_t>(data())) + "}";
 		break;
 	case ReturnContract:
-		text = "returcontract{" +  std::to_string(static_cast<size_t>(data())) + "}";
+		text = "returncontract{" +  std::to_string(static_cast<size_t>(data())) + "}";
 		break;
 	case RelativeJump:
 		text = "rjump{" + std::string("tag_") + std::to_string(relativeJumpTagID()) + "}";

test/cmdlineTests/strict_asm_eof_container_prague/output

@@ -73,7 +73,7 @@ stop
 sub_0: assembly {
       0x00
       dup1
-      returcontract{0}
+      returncontract{0}
     stop
 
     sub_0: assembly {
@@ -89,7 +89,7 @@ sub_0: assembly {
 sub_1: assembly {
       0x00
       dup1
-      returcontract{0}
+      returncontract{0}
     stop
 
     sub_0: assembly {

test/libyul/objectCompiler/eof/creation_with_immutables.yul

@@ -69,7 +69,7 @@ object "a" {
 //         /* "source":397:398   */
 //       0x00
 //         /* "source":377:403   */
-//       returcontract{0}
+//       returncontract{0}
 //     stop
 //
 //     sub_0: assembly {