chore: change nightly builds action name

.github/workflows/nightly-builds.yml

@@ -0,0 +1,45 @@
+name: Nightly builds
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: set up JDK 17
+      uses: actions/setup-java@v3
+      with:
+        java-version: '17'
+        distribution: 'temurin'
+        cache: gradle
+
+    - name: Grant execute permission for gradlew
+      run: chmod +x gradlew
+    
+    - name: Decode Keystore
+      id: decode_keystore
+      uses: timheuer/base64-to-file@v1
+      with:
+        fileName: 'nightly_keystore.jks'  
+        fileDir: './mastodon/keystore/'
+        encodedString: ${{ secrets.KEYSTORE }}
+    
+    - name: Build with Gradle
+      run: ./gradlew assembleNightly
+      env:
+          SIGNING_KEY_ALIAS: ${{ secrets.SIGNING_KEY_ALIAS }}
+          SIGNING_KEY_PASSWORD: ${{ secrets.SIGNING_KEY_PASSWORD }}
+          SIGNING_STORE_PASSWORD: ${{ secrets.SIGNING_STORE_PASSWORD }}
+      
+    - name: Upload a Build Artifact
+      uses: actions/upload-artifact@v3.1.2
+      with:
+       name: moshidon-nightly.apk
+       path: ./mastodon/build/outputs/apk/nightly/moshidon-nightly.apk