Prepare before 1.13.1 release (#37503)

Author: hc-github-team-tf-core

.changes/1.13.1.md

@@ -0,0 +1,10 @@
+## 1.13.1 (August 27, 2025)
+
+
+BUG FIXES:
+
+* Fix regression that caused `terraform test` with zero tests to return a non-zero exit code. ([#37477](https://github.com/hashicorp/terraform/issues/37477))
+
+* terraform test: prevent panic when resolving incomplete references ([#37484](https://github.com/hashicorp/terraform/issues/37484))
+
+

.changes/v1.13/BUG FIXES-20250821-091753.yaml

@@ -1,4 +1,12 @@
-## 1.13.1 (Unreleased)
+## 1.13.1 (August 27, 2025)
+
+
+BUG FIXES:
+
+* Fix regression that caused `terraform test` with zero tests to return a non-zero exit code. ([#37477](https://github.com/hashicorp/terraform/issues/37477))
+
+* terraform test: prevent panic when resolving incomplete references ([#37484](https://github.com/hashicorp/terraform/issues/37484))
+
 
 ## 1.13.0 (August 20, 2025)
 
@@ -54,11 +62,7 @@ NOTES:
 UPGRADE NOTES:
 
 * `terraform test`: External variables referenced within test files should now be accompanied by a `variable` definition block within the test file. This is optional, but users with complex external variables may see error diagnostics without the additional variable definition. ([#37195](https://github.com/hashicorp/terraform/issues/37195))
-EXPERIMENTS:
-
-Experiments are only enabled in alpha releases of Terraform CLI. The following features are not yet available in stable releases.
 
-- The experimental "deferred actions" feature, enabled by passing the `-allow-deferral` option to `terraform plan`, permits `count` and `for_each` arguments in `module`, `resource`, and `data` blocks to have unknown values and allows providers to react more flexibly to unknown values.
 
 ## Previous Releases
 

.changes/v1.13/BUG FIXES-20250825-125018.yaml

@@ -1 +1 @@
-1.13.1-dev
+1.13.1