README.md, sample workflow: bump to latest action versions (#1149)

Author: deining

README.md

@@ -23,12 +23,12 @@ jobs:
   build:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       # ( Build to ./dist or other directory... )
 
       - name: Deploy to Netlify
-        uses: nwtgck/actions-netlify@v2.0
+        uses: nwtgck/actions-netlify@v2.1
         with:
           publish-dir: './dist'
           production-branch: master