[DEVOPS-XXX] Set INSTALL_NODE workflow input to string type (#104)

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## Description

- Set INSTALL_NODE workflow input to string type

## Related Links

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- Jira Issue: DEVOPS-XXX

.github/workflows/ruby-ci.yaml

@@ -13,9 +13,9 @@ on:
  description: "Apt packages to install"
  INSTALL_NODE:
  required: false
- type: boolean
+ type: string
  description: "Whether to install Node.js or not"
- default: false
+ default: 'false'
  NODE_VERSION:
  required: false
  type: string
@@ -45,7 +45,7 @@ jobs:
 
  - name: Set up Node
  uses: actions/setup-node@v3
- if: ${{ inputs.INSTALL_NODE == true }}
+ if: ${{ inputs.INSTALL_NODE == 'true' }}
  with:
  node-version: ${{ inputs.NODE_VERSION }}