Fix JRE/JDK confusion [ci skip]

docs/developers-guide-osx.md

@@ -16,9 +16,9 @@ The following steps need to be done before building the Mac App:
     You can download a copy of a JRE from https://adoptopenjdk.net/releases.html?jvmVariant=hotspot — make sure you download a JRE rather than JDK. Move the `Contents/Home` directory from the JRE archive into `OSX/Metabase/jre`. For example:
 
     ```bash
-    wget https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.8%2B10/OpenJDK11U-jdk_x64_mac_hotspot_11.0.8_10.tar.gz
-    tar -xzvf OpenJDK11U-jdk_x64_mac_hotspot_11.0.8_10.tar.gz  
-    mv jdk-11.0.8+10/Contents/Home OSX/Metabase/jre
+wget https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.8%2B10/OpenJDK11U-jre_x64_mac_hotspot_11.0.8_10.tar.gz
+tar -xzvf OpenJDK11U-jre_x64_mac_hotspot_11.0.8_10.tar.gz
+mv jdk-11.0.8+10-jre/Contents/Home OSX/Metabase/jre
     ```
 
     **VERY IMPORTANT!**