Bump omnibus from 3efa84c to 5479e15 in /omnibus

Bumps [omnibus](https://github.com/chef/omnibus) from `3efa84c` to `5479e15`.
- [Release notes](https://github.com/chef/omnibus/releases)
- [Commits](chef/omnibus@3efa84c...5479e15)

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

Signed-off-by: dependabot[bot] <[email protected]>

omnibus/Gemfile.lock

@@ -9,15 +9,14 @@ GIT
 
 GIT
   remote: https://github.com/chef/omnibus.git
-  revision: 3efa84c1a26daf55c4d477bf3653e5905ab4f737
+  revision: 5479e15df01a917566a2d09e12a7bb39a66e7af0
   branch: main
   specs:
     omnibus (9.0.25)
       aws-sdk-s3 (~> 1.116.0)
       chef-cleanroom (~> 1.0)
       chef-utils (>= 15.4)
       contracts (>= 0.16.0, < 0.17.0)
-      ffi (< 1.17.0)
       ffi-yajl (~> 2.2)
       license_scout (~> 1.0)
       mixlib-shellout (>= 2.0, < 4.0)
@@ -37,8 +36,8 @@ GEM
     ast (2.4.2)
     awesome_print (1.9.2)
     aws-eventstream (1.3.0)
-    aws-partitions (1.961.0)
-    aws-sdk-core (3.201.3)
+    aws-partitions (1.963.0)
+    aws-sdk-core (3.201.4)
       aws-eventstream (~> 1, >= 1.3.0)
       aws-partitions (~> 1, >= 1.651.0)
       aws-sigv4 (~> 1.8)
@@ -149,7 +148,7 @@ GEM
     citrus (3.0.2)
     cleanroom (1.0.0)
     coderay (1.1.3)
-    concurrent-ruby (1.3.3)
+    concurrent-ruby (1.3.4)
     contracts (0.16.1)
     cookbook-omnifetch (0.12.2)
       mixlib-archive (>= 0.4, < 2.0)
@@ -318,7 +317,7 @@ GEM
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
     retryable (3.0.5)
-    rexml (3.3.4)
+    rexml (3.3.5)
       strscan
     rspec (3.11.0)
       rspec-core (~> 3.11.0)