fix: resolve keystore path from project root

Author: mrepol742

.github/workflows/build.yml

@@ -25,7 +25,7 @@ jobs:
         uses: gradle/gradle-build-action@v3
 
       - name: Decode Keystore
-        run: echo "${{ secrets.SIGNING_KEYSTORE }}" | base64 --decode > release.keystore
+        run: echo "${{ secrets.SIGNING_KEYSTORE }}" | base64 --decode > app/release.keystore
 
       - name: Setup Gradle Signing Config
         run: |