use dmd instead of ldc for github actions

Author: MESYETI

.github/workflows/d.yml

@@ -29,7 +29,7 @@ jobs:
     - name: 'Build & Test'
       run: |
         # Build the project, with its main file included, without unittests
-        dub build -b release --compiler=ldc
+        dub build -b release
         
     - name: Upload
       uses: actions/upload-artifact@v3

source/app.d

@@ -129,7 +129,7 @@ int main(string[] args) {
 					break;
 				}
 				case "--version": {
-					writeln("Callisto compiler beta 0.1");
+					writeln("Callisto compiler beta release 0.1");
 					break;
 				}
 				default: {