fix: update Gradle build command in CI workflows (#11)

This commit updates the CI build and release workflows by changing the Gradle build command from `composeApp:buildDebug` to `composeApp:build`.
This change affects the `build.yaml` and `release.yaml` files.
-  the Gradle build command is updated to use `composeApp:build` instead of `composeApp:buildDebug`

Reviewed-on: #11
Co-authored-by: Ben Martin <ben.martin@sky.uk>
Co-committed-by: Ben Martin <ben.martin@sky.uk>

.github/workflows/build.yaml

@@ -25,4 +25,4 @@ jobs:
         uses: android-actions/setup-android@v3
 
       - name: Build with Gradle
-        run: ./gradlew composeApp:buildDebug --no-daemon
+        run: ./gradlew composeApp:build --no-daemon

.github/workflows/release.yaml

@@ -24,7 +24,7 @@ jobs:
         uses: android-actions/setup-android@v3
 
       - name: Build with Gradle
-        run: ./gradlew composeApp:buildDebug --no-daemon
+        run: ./gradlew composeApp:build --no-daemon
 
       - name: Gradle Release
         run: ./gradlew composeApp:debug --no-daemon