Changes optional options to actually be optional

Author: giltene

action.yml

@@ -5,13 +5,13 @@ inputs:
   java-version:
     description: 'The Java version to make available on the path. Takes a whole or semver Java version, or 1.x syntax (e.g. 1.8 => Java 8.x)'
     required: true
-  java-package:
+java-package:
     description: 'The package type (jre, jdk, jdk+fx)'
-    required: true
+    required: false
     default: 'jdk'
-  architecture:
+architecture:
     description: 'The architecture (x86, x64) of the package.'
-    required: true
+    required: false
     default: 'x64'
   jdkFile:
     description: 'Path to where the compressed JDK is located. The path could be in your source repository or a local path on the agent.'