Bump omnibus from 83d8428 to 4b6901c in /omnibus

Bumps [omnibus](https://github.com/chef/omnibus) from `83d8428` to `4b6901c`.
- [Release notes](https://github.com/chef/omnibus/releases)
- [Commits](chef/omnibus@83d8428...4b6901c)

---
updated-dependencies:
- dependency-name: omnibus
  dependency-type: direct:production
...

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

omnibus/Gemfile.lock

@@ -8,10 +8,10 @@ GIT
 
 GIT
   remote: https://github.com/chef/omnibus.git
-  revision: 83d8428abde4cb289a161f736822ba02563a884c
+  revision: 4b6901cf891474291368468b73301057ce9fadde
   branch: main
   specs:
-    omnibus (9.0.3)
+    omnibus (9.0.7)
       aws-sdk-s3 (~> 1)
       chef-cleanroom (~> 1.0)
       chef-utils (>= 15.4)
@@ -29,14 +29,14 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     artifactory (3.0.15)
     ast (2.4.2)
     awesome_print (1.9.2)
     aws-eventstream (1.2.0)
-    aws-partitions (1.614.0)
-    aws-sdk-core (3.131.5)
+    aws-partitions (1.638.0)
+    aws-sdk-core (3.156.0)
       aws-eventstream (~> 1, >= 1.0.2)
       aws-partitions (~> 1, >= 1.525.0)
       aws-sigv4 (~> 1.1)
@@ -286,7 +286,7 @@ GEM
     pry (0.14.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    public_suffix (4.0.7)
+    public_suffix (5.0.0)
     rack (2.2.3.1)
     rainbow (3.1.1)
     regexp_parser (2.2.1)