fix typo

Co-authored-by: Dan Leehr <dleehr@users.noreply.github.com>

Author: DanielMSchmidt

internal/terraform/context_plan_actions_test.go

@@ -456,7 +456,7 @@ resource "test_object" "a" {
 			expectPlanDiagnostics: func(m *configs.Config) (diags tfdiags.Diagnostics) {
 				return diags.Append(&hcl.Diagnostic{
 					Severity: hcl.DiagError,
-					Summary:  "Reference to non-existant action instance",
+					Summary:  "Reference to non-existent action instance",
 					Detail:   "Action instance was not found in the current context.",
 					Subject: &hcl.Range{
 						Filename: filepath.Join(m.Module.SourceDir, "main.tf"),
@@ -491,7 +491,7 @@ resource "test_object" "a" {
 			expectPlanDiagnostics: func(m *configs.Config) (diags tfdiags.Diagnostics) {
 				return diags.Append(&hcl.Diagnostic{
 					Severity: hcl.DiagError,
-					Summary:  "Reference to non-existant action instance",
+					Summary:  "Reference to non-existent action instance",
 					Detail:   "Action instance was not found in the current context.",
 					Subject: &hcl.Range{
 						Filename: filepath.Join(m.Module.SourceDir, "main.tf"),

internal/terraform/node_action_trigger_instance_plan.go

@@ -73,7 +73,7 @@ func (n *nodeActionTriggerPlanInstance) Execute(ctx EvalContext, operation walkO
 	if !ok {
 		diags = diags.Append(&hcl.Diagnostic{
 			Severity: hcl.DiagError,
-			Summary:  "Reference to non-existant action instance",
+			Summary:  "Reference to non-existent action instance",
 			Detail:   "Action instance was not found in the current context.",
 			Subject:  n.lifecycleActionTrigger.invokingSubject,
 		})