update permissions on protoc-gen-nanopb

.github/workflows/esp-idf-v4.3-build.yml

@@ -49,6 +49,7 @@ jobs:
       run: |
         git update-index --chmod=+x ./server_certs/getcert.sh
         git update-index --chmod=+x ./components/spotify/cspot/bell/nanopb/generator/protoc
+        git update-index --chmod=+x ./components/spotify/cspot/bell/nanopb/generator/protoc-gen-nanopb
         cd server_certs;./getcert.sh;cat github.pem;cd ..
         shopt -s nocasematch
         branch_name="${GITHUB_REF//refs\/heads\//}"