NIFI-11634 Update testcontainers.version to 1.18.3

Signed-off-by: Pierre Villard <pierre.villard.fr@gmail.com>

This closes #7331.
diff --git a/pom.xml b/pom.xml
index ea9d200..08f31c7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -117,7 +117,7 @@
         <org.apache.httpcomponents.httpclient.version>4.5.14</org.apache.httpcomponents.httpclient.version>
         <org.apache.httpcomponents.httpcore.version>4.4.16</org.apache.httpcomponents.httpcore.version>
         <org.bouncycastle.version>1.71</org.bouncycastle.version>
-        <testcontainers.version>1.18.1</testcontainers.version>
+        <testcontainers.version>1.18.3</testcontainers.version>
         <org.slf4j.version>2.0.7</org.slf4j.version>
         <ranger.version>2.4.0</ranger.version>
         <jetty.version>9.4.51.v20230217</jetty.version>