fix: reference environment variables correctly in Github Action

The local.properties file was being written with the literal strings of the environment variable names instead of their values.

This change ensures the correct values are used when decoding the keystore and writing to local.properties.

Author: eby-dev

.github/workflows/android.yml

@@ -51,15 +51,15 @@ jobs:
           bundle install
 
       - name: Decode Keystore File
-        run: echo "${{ secrets.KEYSTORE_FILE }}" | base64 -d > $KEYSTORE_FILE
+        run: echo "${{ secrets.KEYSTORE_FILE }}" | base64 -d > "${{ env.KEYSTORE_FILE }}"
 
       - name: Write local.properties
         run: |
           echo "sdk.dir=$ANDROID_HOME" > local.properties
-          echo "KEYSTORE_FILE=$KEYSTORE_FILE" >> local.properties
-          echo "KEYSTORE_PASSWORD=$KEYSTORE_PASSWORD" >> local.properties
-          echo "KEY_ALIAS=$KEY_ALIAS" >> local.properties
-          echo "KEY_PASSWORD=$KEY_PASSWORD" >> local.properties
+          echo "KEYSTORE_FILE=${{ env.KEYSTORE_FILE }}" >> local.properties
+          echo "KEYSTORE_PASSWORD=${{ env.KEYSTORE_PASSWORD }}" >> local.properties
+          echo "KEY_ALIAS=${{ env.KEY_ALIAS }}" >> local.properties
+          echo "KEY_PASSWORD=${{ env.KEY_PASSWORD }}" >> local.properties
 
       - name: Create Google Service Account JSON
         run: |