Move zmk field into merge

"You may only define up to 10 `inputs` for a `workflow_dispatch` event"

.github/workflows/build-inputs.yml

@@ -40,12 +40,8 @@ on:
         description: 'Kconfig'
         required: false
         default: 'default'
-      zmk:
-        description: 'ZMK'
-        required: false
-        default: 'default'
       merge:
-        description: 'Merge'
+        description: 'ZMK Branches'
         required: false
         default: 'default'
 jobs:
@@ -61,7 +57,6 @@ jobs:
       mapping: ${{ steps.process-inputs.outputs.mapping }}
       config: ${{ steps.process-inputs.outputs.config }}
       kconfig: ${{ steps.process-inputs.outputs.kconfig }}
-      zmk: ${{ steps.process-inputs.outputs.zmk }}
       merge: ${{ steps.process-inputs.outputs.merge }}
     steps:
       - name: Process inputs
@@ -81,7 +76,6 @@ jobs:
           set-output "mapping" "${{ github.event.inputs.mapping }}"
           set-output "config" "${{ github.event.inputs.config }}"
           set-output "kconfig" "${{ github.event.inputs.kconfig }}"
-          set-output "zmk" "${{ github.event.inputs.zmk }}"
           set-output "merge" "${{ github.event.inputs.merge }}"
   build:
     uses: manna-harbour/zmk-config/.github/workflows/main.yml@31a649e5571b4572d7010561dd3f191922cd9410
@@ -96,5 +90,4 @@ jobs:
       mapping: ${{ needs.process-inputs.outputs.mapping }}
       config: ${{ needs.process-inputs.outputs.config }}
       kconfig: ${{ needs.process-inputs.outputs.kconfig }}
-      zmk: ${{ needs.process-inputs.outputs.zmk }}
       merge: ${{ needs.process-inputs.outputs.merge }}