bump MariaDB version

EOL for 11.2 is coming up in a few weeks, see: https://mariadb.org/about/#maintenance-policy

I upgraded my local MariaDB dev database to 11.4 and performed a few cursory GETs and PUTs via the Fineract API--just what I've learned to do so far. Nothing broke. I didn't run all the tests though.

I didn't see any obvious red flags in https://mariadb.com/kb/en/changes-improvements-in-mariadb-11-4/

README.md

@@ -22,15 +22,15 @@ If you are interested in contributing to this project, but perhaps don't quite k
 REQUIREMENTS
 ============
 * `Java >= 17` (Azul Zulu JVM is tested by our CI on GitHub Actions)
-* MariaDB `11.2`
+* MariaDB `11.4`
 
 You can run the required version of the database server in a container, instead of having to install it, like this:
 
-    docker run --name mariadb-11.2 -p 3306:3306 -e MARIADB_ROOT_PASSWORD=mysql -d mariadb:11.2
+    docker run --name mariadb-11.4 -p 3306:3306 -e MARIADB_ROOT_PASSWORD=mysql -d mariadb:11.4
 
 and stop and destroy it like this:
 
-    docker rm -f mariadb-11.2
+    docker rm -f mariadb-11.4
 
 <br>Beware that this database container database keeps its state inside the container and not on the host filesystem.  It is lost when you destroy (rm) this container.  This is typically fine for development.  See [Caveats: Where to Store Data on the database container documentation](https://hub.docker.com/_/mariadb) re. how to make it persistent instead of ephemeral.<br>
 

config/docker/compose/mariadb.yml

@@ -18,7 +18,7 @@ version: "3.8"
 services:
   mariadb:
     container_name: mariadb
-    image: mariadb:11.2
+    image: mariadb:11.4
     volumes:
       - ${PWD}/config/docker/mysql/conf.d/server_collation.cnf:/etc/mysql/conf.d/server_collation.cnf:ro
       - ${PWD}/config/docker/mysql/docker-entrypoint-initdb.d:/docker-entrypoint-initdb.d:Z,ro

kubernetes/fineractmysql-deployment.yml

@@ -86,7 +86,7 @@ spec:
         tier: fineractmysql
     spec:
       containers:
-        - image: mariadb:11.2
+        - image: mariadb:11.4
           name: mysql
           resources:
             requests: