Update changelog based on model updates

Author: aws-sdk-python-automation

.changes/next-release/api-change-bedrockruntime-93414.json

@@ -0,0 +1,5 @@
+{
+  "type": "api-change",
+  "category": "``bedrock-runtime``",
+  "description": "Fixed stop sequence limit for converse API."
+}

.changes/next-release/api-change-ec2-19926.json

@@ -0,0 +1,5 @@
+{
+  "type": "api-change",
+  "category": "``ec2``",
+  "description": "Release shows new route types such as filtered and advertisement."
+}

.changes/next-release/api-change-xray-87422.json

@@ -0,0 +1,5 @@
+{
+  "type": "api-change",
+  "category": "``xray``",
+  "description": "AWS X-Ray Features: Support Sampling Rate Boost On Anomaly"
+}