fix: fix required whitespace in validation check script

Author: foosel

action.yml

@@ -27,9 +27,9 @@ runs:
   steps:
     - name: "Validate CustoPiZer action inputs"
       run: |
-        [ -f "${{ inputs.workspace }}"] || $(echo "Validation error: inputs.workspace does not exist!" && exit -1)
-        [ -f "${{ inputs.scripts }}"] || $(echo "Validation error: inputs.scripts does not exist!" && exit -1)
-        [ -z "${{ inputs.config }}"] || [ -f "${{ inputs.config }}" ] || $(echo "Validation error: inputs.config does not exist!" && exit -1)
+        [ -f "${{ inputs.workspace }}" ] || $(echo "Validation error: inputs.workspace does not exist!" && exit -1)
+        [ -f "${{ inputs.scripts }}" ] || $(echo "Validation error: inputs.scripts does not exist!" && exit -1)
+        [ -z "${{ inputs.config }}" ] || [ -f "${{ inputs.config }}" ] || $(echo "Validation error: inputs.config does not exist!" && exit -1)
         [ -z "${{ inputs.environment }}" ] || $(echo '${{ inputs.environment }}' | jq) || $(echo "Validation error: inputs.environment does not contain valid json!" && exit -1)
         [ -z "${{ inputs.custopizer }}" ] || [[ "${{ inputs.custopizer }}" ~= ^[a-zA-Z0-9_][a-zA-Z0-9_.-]{0,127}$ || "${{ inputs.custopizer }}" =~ sha256:[a-f0-9]{64}$ ]] || $(echo "Validation error: inputs.custopizer does not contain a valid version!" && exit -1)
       shell: bash