Rename project name, bump up Gradle version and update README

Author: nixos89

README.md

@@ -12,7 +12,7 @@ Simple ToDo app containing REST API written in Java and Kotlin using:
    **username**=`postgres`<br/>
    **password**=`system`<br/>
    **NOTE**: Make sure they are matching `spring.datasource.username` / `spring.flyway.user` properties in `application.properties` file
-2. Enter directory of `first-java-kotlin-gradle-project` module
+2. Enter directory of `todo-kotlin-java-app` module
 3. Make sure  property `spring.flyway.enabled` is set to `true` located in `src/main/resources/application.properties`
 4. Execute `./gradlew bootRun` command
 5. Before 2nd and every other app run (i.e. before executing Step4) set `spring.flyway.enabled` property to `false` located in `src/main/resources/application.properties` 

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.8-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

settings.gradle.kts

@@ -1,4 +1,4 @@
-rootProject.name = "first-java-kotlin-gradle-project"
+rootProject.name = "todo-kotlin-java-app"