Bump asciidoctorj-diagram from 2.2.4 to 2.2.7 (#533)

* Bump asciidoctorj-diagram from 2.2.4 to 2.2.7

Bumps [asciidoctorj-diagram](https://github.com/asciidoctor/asciidoctorj-diagram) from 2.2.4 to 2.2.7.
- [Release notes](https://github.com/asciidoctor/asciidoctorj-diagram/releases)
- [Commits](https://github.com/asciidoctor/asciidoctorj-diagram/commits)

---
updated-dependencies:
- dependency-name: org.asciidoctor:asciidoctorj-diagram
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

* make it compatible with new PlantUML

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Ivan Ponomarev <iponomarev@mail.ru>

Author: dependabot[bot]

celesta-documentation/pom.xml

@@ -44,7 +44,7 @@
                     <dependency>
                         <groupId>org.asciidoctor</groupId>
                         <artifactId>asciidoctorj-diagram</artifactId>
-                        <version>2.2.4</version>
+                        <version>2.2.7</version>
                     </dependency>
                 </dependencies>
                 <configuration>

celesta-documentation/src/main/asciidoc/uml.adoc

@@ -106,12 +106,12 @@ class FooCursor {
   +setBar(String bar)
 }
 
-class FooCursor.Columns {
+class Columns {
   +foo(): ColumnMeta<Integer>
   +bar(): ColumnMeta<String>
 }
 
-FooCursor "COLUMNS" --> FooCursor.Columns
+FooCursor "COLUMNS" --> Columns
 @enduml
 ----