Bump the app-dependencies group with 1 update (#136)

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

pom.xml

@@ -116,7 +116,7 @@
 
         <!-- Test Dependency Versions -->
 
-        <version.org.testcontainers.postgresql>1.19.3</version.org.testcontainers.postgresql>
+        <version.org.testcontainers.postgresql>1.19.4</version.org.testcontainers.postgresql>
         <version.wiremock>2.35.1</version.wiremock>
 
         <!-- Plugin Versions -->