Release 2.31.78. Updated CHANGELOG.md, README.md and all pom.xml.

Author: AWS

.changes/2.31.78.json

@@ -0,0 +1,54 @@
+{
+    "version": "2.31.78",
+    "date": "2025-07-09",
+    "entries": [
+        {
+            "type": "bugfix",
+            "category": "AWS Query Protocol",
+            "contributor": "",
+            "description": "Fixed EC2 DescribeInstances query failure in non-ASCII digit locales by using ROOT locale when formatting query paths to ensure ASCII digits are always used."
+        },
+        {
+            "type": "bugfix",
+            "category": "AWS SDK for Java v2",
+            "contributor": "",
+            "description": "Fixed AsyncRequestBody.fromByteBuffers() and related methods to properly complete when called with no buffers"
+        },
+        {
+            "type": "bugfix",
+            "category": "AWS SDK for Java v2",
+            "contributor": "",
+            "description": "Fix an issue where the CRC64NVME class cannot be loaded from CRT in some situations, even if `aws-crt` is correctly included in the application classpath."
+        },
+        {
+            "type": "feature",
+            "category": "AWS Free Tier",
+            "contributor": "",
+            "description": "This release introduces four new APIs: GetAccountPlanState and UpgradeAccountPlan for AWS account plan management; ListAccountActivities and GetAccountActivity that provide activity tracking capabilities."
+        },
+        {
+            "type": "feature",
+            "category": "AWS OpsWorks CM",
+            "contributor": "",
+            "description": "Removing content that refers to an S3 bucket that is no longer in use."
+        },
+        {
+            "type": "feature",
+            "category": "AWS SDK for Java v2",
+            "contributor": "",
+            "description": "Add validation for invalid usages of the `enableEnvironmentBearerToken` codegen customization."
+        },
+        {
+            "type": "feature",
+            "category": "Amazon Elastic Compute Cloud",
+            "contributor": "",
+            "description": "Adds support to Capacity Blocks for ML for purchasing EC2 P6e-GB200 UltraServers. Customers can now purchase u-p6e-gb200x72 and u-p6e-gb200x36 UltraServers. Adds new DescribeCapacityBlocks andDescribeCapacityBlockStatus APIs. Adds support for CapacityBlockId to DescribeInstanceTopology."
+        },
+        {
+            "type": "feature",
+            "category": "AWS SDK for Java v2",
+            "contributor": "",
+            "description": "Updated endpoint and partition metadata."
+        }
+    ]
+}

.changes/next-release/bugfix-AWSQueryProtocol-1398d13.json

@@ -1,4 +1,30 @@
  #### 👋 _Looking for changelogs for older versions? You can find them in the [changelogs](./changelogs) directory._
+# __2.31.78__ __2025-07-09__
+## __AWS Free Tier__
+  - ### Features
+    - This release introduces four new APIs: GetAccountPlanState and UpgradeAccountPlan for AWS account plan management; ListAccountActivities and GetAccountActivity that provide activity tracking capabilities.
+
+## __AWS OpsWorks CM__
+  - ### Features
+    - Removing content that refers to an S3 bucket that is no longer in use.
+
+## __AWS Query Protocol__
+  - ### Bugfixes
+    - Fixed EC2 DescribeInstances query failure in non-ASCII digit locales by using ROOT locale when formatting query paths to ensure ASCII digits are always used.
+
+## __AWS SDK for Java v2__
+  - ### Features
+    - Add validation for invalid usages of the `enableEnvironmentBearerToken` codegen customization.
+    - Updated endpoint and partition metadata.
+
+  - ### Bugfixes
+    - Fix an issue where the CRC64NVME class cannot be loaded from CRT in some situations, even if `aws-crt` is correctly included in the application classpath.
+    - Fixed AsyncRequestBody.fromByteBuffers() and related methods to properly complete when called with no buffers
+
+## __Amazon Elastic Compute Cloud__
+  - ### Features
+    - Adds support to Capacity Blocks for ML for purchasing EC2 P6e-GB200 UltraServers. Customers can now purchase u-p6e-gb200x72 and u-p6e-gb200x36 UltraServers. Adds new DescribeCapacityBlocks andDescribeCapacityBlockStatus APIs. Adds support for CapacityBlockId to DescribeInstanceTopology.
+
 # __2.31.77__ __2025-07-03__
 ## __AWS Elemental MediaPackage v2__
   - ### Features