Update path in workflow for paxo-v5 build

The path in the platformio-ci.yml workflow for the paxo-v5 build has been updated. Previously, several exceptions were listed individually, but these have now been replaced with a single 'build' directory. This is expected to streamline the build process.

.github/workflows/platformio-ci.yml

@@ -53,11 +53,7 @@ jobs:
             with:
               name: paxo-v5-build
               path: |
-                .pio/build/paxo-v5
-                !.pio/build/paxo-v5/lib*
-                !.pio/build/paxo-v5/src
-                !.pio/build/paxo-v5/idedata.json
-                storage
+                build
 
     linux_build_test_upload:
         runs-on: ubuntu-latest