Bump the flyway group across 1 directory with 3 updates

Bumps the flyway group with 3 updates in the /prime-router directory: org.flywaydb:flyway-database-postgresql, [org.flywaydb:flyway-core](https://github.com/flyway/flyway) and org.flywaydb.flyway.


Updates `org.flywaydb:flyway-database-postgresql` from 10.18.2 to 10.20.0

Updates `org.flywaydb:flyway-core` from 10.18.2 to 10.20.0
- [Release notes](https://github.com/flyway/flyway/releases)
- [Commits](flyway/flyway@flyway-10.18.2...flyway-10.20.0)

Updates `org.flywaydb.flyway` from 10.18.2 to 10.20.0

---
updated-dependencies:
- dependency-name: org.flywaydb:flyway-database-postgresql
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: flyway
- dependency-name: org.flywaydb:flyway-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: flyway
- dependency-name: org.flywaydb.flyway
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: flyway
...

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

prime-router/build.gradle.kts

@@ -35,7 +35,7 @@ apply(from = rootProject.file("buildSrc/shared.gradle.kts"))
 plugins {
     val kotlinVersion by System.getProperties()
     id("reportstream.project-conventions")
-    id("org.flywaydb.flyway") version "10.18.2"
+    id("org.flywaydb.flyway") version "10.20.0"
     id("nu.studer.jooq") version "9.0"
     id("com.github.johnrengelman.shadow") version "8.1.1"
     id("com.microsoft.azure.azurefunctions") version "1.16.1"
@@ -839,7 +839,7 @@ buildscript {
         // will need to be removed once this issue is resolved in Maven.
         classpath("net.minidev:json-smart:2.5.1")
         // as per flyway v10 docs the postgres flyway module must be on the project buildpath
-        classpath("org.flywaydb:flyway-database-postgresql:10.18.2")
+        classpath("org.flywaydb:flyway-database-postgresql:10.20.0")
     }
 }
 
@@ -923,8 +923,8 @@ dependencies {
     implementation("commons-io:commons-io:2.17.0")
     implementation("org.postgresql:postgresql:42.7.4")
     implementation("com.zaxxer:HikariCP:6.0.0")
-    implementation("org.flywaydb:flyway-core:10.18.2")
-    implementation("org.flywaydb:flyway-database-postgresql:10.18.2")
+    implementation("org.flywaydb:flyway-core:10.20.0")
+    implementation("org.flywaydb:flyway-database-postgresql:10.20.0")
     implementation("org.commonmark:commonmark:0.23.0")
     implementation("com.google.guava:guava:33.3.1-jre")
     implementation("com.helger.as2:as2-lib:5.1.2")