Bump dnsruby from 1.72.2 to 1.72.3

Bumps [dnsruby](https://github.com/alexdalitz/dnsruby) from 1.72.2 to 1.72.3.
- [Changelog](https://github.com/alexdalitz/dnsruby/blob/master/RELEASE_NOTES.md)
- [Commits](https://github.com/alexdalitz/dnsruby/commits/v1.72.3)

---
updated-dependencies:
- dependency-name: dnsruby
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -134,7 +134,8 @@ GEM
     debug (1.9.2)
       irb (~> 1.10)
       reline (>= 0.3.8)
-    dnsruby (1.72.2)
+    dnsruby (1.72.3)
+      base64 (~> 0.2.0)
       simpleidn (~> 0.2.1)
     dockerfile-rails (1.6.22)
       rails (>= 3.0.0)