add vars input for bake variables

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

action.yml

@@ -50,6 +50,9 @@ inputs:
   targets:
     description: "List of bake targets"
     required: false
+  vars:
+    description: "Variables to set in the Bake definition as list of key-value pair"
+    required: false
   github-token:
     description: "API token used to authenticate to a Git repository for remote definitions"
     default: ${{ github.token }}