Bump omnibus-software from 2bda5ed to a8ffc89 in /omnibus (#2810)

Bumps [omnibus-software](https://github.com/chef/omnibus-software) from `2bda5ed` to `a8ffc89`.
- [Release notes](https://github.com/chef/omnibus-software/releases)
- [Commits](chef/omnibus-software@2bda5ed...a8ffc89)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

omnibus/Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: https://github.com/chef/omnibus-software.git
-  revision: 2bda5edeaec109a65f9544db8ffd73a2ca5adfc9
+  revision: a8ffc8927d7709c6a53d567d3f57e0b501dccbeb
   branch: main
   specs:
     omnibus-software (4.0.0)
@@ -35,7 +35,7 @@ GEM
     ast (2.4.2)
     awesome_print (1.9.2)
     aws-eventstream (1.2.0)
-    aws-partitions (1.601.0)
+    aws-partitions (1.602.0)
     aws-sdk-core (3.131.2)
       aws-eventstream (~> 1, >= 1.0.2)
       aws-partitions (~> 1, >= 1.525.0)
@@ -355,7 +355,7 @@ GEM
     toml-rb (2.1.2)
       citrus (~> 3.0, > 3.0)
     tomlrb (1.3.0)
-    train-core (3.10.0)
+    train-core (3.10.1)
       addressable (~> 2.5)
       ffi (!= 1.13.0)
       json (>= 1.8, < 3.0)