[COMPLIANCE] Update Copyright and License Headers (Batch 5 of 6) (#1247)

Co-authored-by: hashicorp-copywrite[bot] <110428419+hashicorp-copywrite[bot]@users.noreply.github.com>
Co-authored-by: Rain Kwan <91649079+rainkwan@users.noreply.github.com>

Author: 3 people

list/schema/list_nested_block.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package schema

list/schema/list_nested_block_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package schema_test

list/schema/map_attribute.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package schema

list/schema/map_attribute_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package schema_test

list/schema/map_nested_attribute.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package schema

list/schema/map_nested_attribute_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package schema_test

list/schema/nested_attribute.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package schema

list/schema/nested_attribute_object.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package schema

list/schema/nested_attribute_object_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package schema_test

list/schema/nested_block_object.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2021, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package schema