build: fix tests again

.github/workflows/tests.yml

@@ -16,8 +16,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - run: sudo apt-get install curl
-    - run: cd examples/TemperatureController
     - run: mkdir arduino-cli
     - run: curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | BINDIR=./arduino-cli sh
     - run: ./arduino-cli/arduino-cli core install arduino:avr
-    - run: ./arduino-cli/arduino-cli compile --verbose --build-path ./build --library ../../ -b arduino:avr:nano *.ino
+    - run: ./arduino-cli/arduino-cli compile --verbose --build-path ./examples/TemperatureController/build --library . -b arduino:avr:nano ./examples/TemperatureController/*.ino

.gitignore

@@ -1,4 +1,5 @@
 .pio
 .vscode
+arduino-cli
 build
 docs

examples/TemperatureController/.gitignore

@@ -1,2 +1 @@
 build
-arduino-cli