Bump aws-sdk-codestar in /contrib/cloudformation-template

Bumps [aws-sdk-codestar](https://github.com/aws/aws-sdk-ruby) from 1.20.0 to 1.37.0.
- [Release notes](https://github.com/aws/aws-sdk-ruby/releases)
- [Changelog](https://github.com/aws/aws-sdk-ruby/blob/version-3/gems/aws-sdk-codestar/CHANGELOG.md)
- [Commits](aws/aws-sdk-ruby@1.20.0...v1.37.0)

---
updated-dependencies:
- dependency-name: aws-sdk-codestar
  dependency-type: indirect
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

contrib/cloudformation-template/Gemfile.lock

@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    aws-eventstream (1.1.0)
-    aws-partitions (1.322.0)
+    aws-eventstream (1.2.0)
+    aws-partitions (1.553.0)
     aws-sdk (3.0.1)
       aws-sdk-resources (~> 3)
     aws-sdk-accessanalyzer (1.6.0)
@@ -128,8 +128,8 @@ GEM
     aws-sdk-codepipeline (1.30.0)
       aws-sdk-core (~> 3, >= 3.71.0)
       aws-sigv4 (~> 1.1)
-    aws-sdk-codestar (1.20.0)
-      aws-sdk-core (~> 3, >= 3.71.0)
+    aws-sdk-codestar (1.37.0)
+      aws-sdk-core (~> 3, >= 3.126.0)
       aws-sigv4 (~> 1.1)
     aws-sdk-codestarconnections (1.3.0)
       aws-sdk-core (~> 3, >= 3.71.0)
@@ -164,9 +164,9 @@ GEM
     aws-sdk-connectparticipant (1.2.0)
       aws-sdk-core (~> 3, >= 3.71.0)
       aws-sigv4 (~> 1.1)
-    aws-sdk-core (3.96.1)
+    aws-sdk-core (3.126.0)
       aws-eventstream (~> 1, >= 1.0.2)
-      aws-partitions (~> 1, >= 1.239.0)
+      aws-partitions (~> 1, >= 1.525.0)
       aws-sigv4 (~> 1.1)
       jmespath (~> 1.0)
     aws-sdk-costandusagereportservice (1.20.0)
@@ -905,8 +905,8 @@ GEM
       aws-sdk-core (~> 3, >= 3.71.0)
       aws-sigv4 (~> 1.1)
     aws-sigv2 (1.0.1)
-    aws-sigv4 (1.1.3)
-      aws-eventstream (~> 1.0, >= 1.0.2)
+    aws-sigv4 (1.4.0)
+      aws-eventstream (~> 1, >= 1.0.2)
     cloudformation-ruby-dsl (1.5.0)
       aws-sdk (>= 2.5.1)
       bundler
@@ -918,7 +918,7 @@ GEM
     detabulator (0.1.0)
     diffy (3.3.0)
     highline (2.0.3)
-    jmespath (1.4.0)
+    jmespath (1.5.0)
     json (2.3.0)
     rake (13.0.1)