fix: Make abrousseau001@ Homebrew contribution comply with Error Prone rule enforced in this project

See https://errorprone.info/bugpattern/StringCaseLocaleUsage

(and google/error-prone#4951)

Author: vorburger

mariaDB4j-core/src/main/java/ch/vorburger/mariadb4j/Util.java

@@ -23,6 +23,7 @@
 import java.io.IOException;
 import java.net.URL;
 import java.nio.charset.StandardCharsets;
+import java.util.Locale;
 import java.util.concurrent.TimeUnit;
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.lang3.SystemUtils;
@@ -191,7 +192,7 @@ public static boolean installMariaDbFromHomebrew() {
 
                 String checkInstallOutput = new String(brewInstall.getInputStream().readAllBytes(), StandardCharsets.UTF_8);
 
-                if (checkInstallOutput.toLowerCase().contains("error")) {
+                if (checkInstallOutput.toLowerCase(Locale.ROOT).contains("error")) {
                     throw new IllegalStateException("Failed to install mariadb with Homebrew - see " + checkInstallOutput);
                 }