fix: correct conditional syntax for bypass input in artifact gathering step

.github/actions/build-kernel/action.yml

@@ -126,7 +126,7 @@ runs:
 
   - name: 'Gather Build Artifacts'
     shell: bash
-    if: inputs.bypass == true
+    if: ${{ inputs.bypass == 'true' }}
     working-directory: ${{ github.workspace }}
     run: |
       set -euo pipefail