fix actions builds

Signed-off-by: androidacy-user <opensource@androidacy.com>

app/build.gradle.kts

@@ -38,6 +38,7 @@ android {
     ndkVersion = "25.2.9519653"
     signingConfigs {
         create("release") {
+            if (File("signing.properties").exists()) {
                 val properties = Properties().apply {
                     load(File("signing.properties").reader())
                 }
@@ -47,6 +48,7 @@ android {
                 keyAlias = properties.getProperty("keyAlias")
             }
         }
+    }
     defaultConfig {
         applicationId = "com.fox2code.mmm"
         minSdk = 24