[MINOR UPDATE] Potential fix for code scanning alert no. 41: Use of a cryptographic algorithm with insufficient key size (#3089)

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: cgivre

exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/ssl/SslContextFactoryConfigurator.java

@@ -165,7 +165,7 @@ private void useAutoGeneratedSelfSignedCertificate(SslContextFactory.Server sslC
 
     // Generate a private-public key pair
     final KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
-    keyPairGenerator.initialize(1024, random);
+    keyPairGenerator.initialize(2048, random);
     final KeyPair keyPair = keyPairGenerator.generateKeyPair();