Update asciidoctor-plantuml gem to v0.0.12

This adds support for the deflate encoding:
https://github.com/hsanson/asciidoctor-plantuml/pull/12

Currently this can only be changed by setting the `PLANTUML_ENCODING`
environment variable to `deflate`.

Relates to https://gitlab.com/gitlab-org/gitlab/-/issues/216587

Gemfile

@@ -148,7 +148,7 @@ gem 'creole', '~> 0.5.0'
 gem 'wikicloth', '0.8.1'
 gem 'asciidoctor', '~> 2.0.10'
 gem 'asciidoctor-include-ext', '~> 0.3.1', require: false
-gem 'asciidoctor-plantuml', '0.0.10'
+gem 'asciidoctor-plantuml', '~> 0.0.12'
 gem 'rouge', '~> 3.19.0'
 gem 'truncato', '~> 0.7.11'
 gem 'bootstrap_form', '~> 4.2.0'

Gemfile.lock

@@ -84,7 +84,7 @@ GEM
     asciidoctor (2.0.10)
     asciidoctor-include-ext (0.3.1)
       asciidoctor (>= 1.5.6, < 3.0.0)
-    asciidoctor-plantuml (0.0.10)
+    asciidoctor-plantuml (0.0.12)
       asciidoctor (>= 1.5.6, < 3.0.0)
     ast (2.4.0)
     atlassian-jwt (0.2.0)
@@ -1162,7 +1162,7 @@ DEPENDENCIES
   asana (~> 0.9)
   asciidoctor (~> 2.0.10)
   asciidoctor-include-ext (~> 0.3.1)
-  asciidoctor-plantuml (= 0.0.10)
+  asciidoctor-plantuml (~> 0.0.12)
   atlassian-jwt (~> 0.2.0)
   attr_encrypted (~> 3.1.0)
   awesome_print

changelogs/unreleased/sh-update-plantutml-gem.yml

+---
+title: Update asciidoctor-plantuml gem to v0.0.12
+merge_request: 32376
+author:
+type: other