fix other places where locale might matter

src/main/java/com/gmail/nossr50/config/skills/salvage/SalvageConfig.java

@@ -44,7 +44,7 @@ public class SalvageConfig extends BukkitConfig {
         if (mcMMO.getUpgradeManager().shouldUpgrade(UpgradeType.FIX_NETHERITE_SALVAGE_QUANTITIES)) {
             mcMMO.p.getLogger().log(Level.INFO, "Fixing incorrect Salvage quantities on Netherite gear, this will only run once...");
             for (String namespacedkey : mcMMO.getMaterialMapStore().getNetheriteArmor()) {
-                config.set("Salvageables." + namespacedkey.toUpperCase() + ".MaximumQuantity", 4); //TODO: Doesn't make sense to default to 4 for everything
+                config.set("Salvageables." + namespacedkey.toUpperCase(Locale.ENGLISH) + ".MaximumQuantity", 4); //TODO: Doesn't make sense to default to 4 for everything
             }
 
             try {

src/main/java/com/gmail/nossr50/util/ItemUtils.java

@@ -30,6 +30,7 @@ import java.lang.reflect.Method;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
+import java.util.Locale;
 import java.util.function.Predicate;
 
 import static java.util.Objects.requireNonNull;
@@ -111,12 +112,12 @@ public final class ItemUtils {
 
         // try to match to Material ENUM
         if (material == null) {
-            material = Material.getMaterial(materialName.toUpperCase());
+            material = Material.getMaterial(materialName.toUpperCase(Locale.ENGLISH));
         }
 
         // try to match to Material ENUM with legacy name
         if (material == null) {
-            material = Material.getMaterial(materialName.toUpperCase(), true);
+            material = Material.getMaterial(materialName.toUpperCase(Locale.ENGLISH), true);
         }
         return material;
     }