Update example.yml

Author: Jason2866

.github/workflows/example.yml

@@ -25,7 +25,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install wheel
-          pip install -U https://github.com/Jason2866/platformio-core/archive/refs/tags/v6.1.17.zip
+          pip install -U https://github.com/pioarduino/platformio-core/archive/refs/tags/v6.1.18.zip
       - name: Build example
         run: |
           pio run