[CP-stable] Bump hotfix version for `package:unified_analytics` (#143885)

This fixes flakey bug around parsing session json file by bumping to analytics package version to a hotfix
- https://github.com/flutter/flutter/issues/143792
diff --git a/packages/flutter_tools/pubspec.yaml b/packages/flutter_tools/pubspec.yaml
index 456dbcc..a37d93f 100644
--- a/packages/flutter_tools/pubspec.yaml
+++ b/packages/flutter_tools/pubspec.yaml
@@ -51,7 +51,7 @@
   http_multi_server: 3.2.1
   convert: 3.1.1
   async: 2.11.0
-  unified_analytics: 5.8.0
+  unified_analytics: 5.8.0+1
 
   cli_config: 0.1.2
   graphs: 2.3.1
@@ -118,4 +118,4 @@
   # Exclude this package from the hosted API docs.
   nodoc: true
 
-# PUBSPEC CHECKSUM: 45be
+# PUBSPEC CHECKSUM: a81b