Bump diktat-rules from 1.2.1 to 1.2.3

Bumps [diktat-rules](https://github.com/saveourtool/diktat) from 1.2.1 to 1.2.3.
- [Release notes](https://github.com/saveourtool/diktat/releases)
- [Commits](saveourtool/diktat@v1.2.1...v1.2.3)

---
updated-dependencies:
- dependency-name: org.cqfn.diktat:diktat-rules
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

lib/build.gradle

@@ -51,7 +51,7 @@ dependencies {
 	ktlintCompileOnly "com.pinterest.ktlint:ktlint-ruleset-experimental:$VER_KTLINT"
 	ktlintCompileOnly "com.pinterest.ktlint:ktlint-ruleset-standard:$VER_KTLINT"
 
-	String VER_DIKTAT = "1.2.1"
+	String VER_DIKTAT = "1.2.3"
 	diktatCompileOnly "org.cqfn.diktat:diktat-rules:$VER_DIKTAT"
 
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