CI: bump setup-dlang to v2

Signed-off-by: Andrei Horodniceanu <a.horodniceanu@proton.me>

Author: the-horo

.github/workflows/main.yml

@@ -23,7 +23,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install D compiler
-        uses: dlang-community/setup-dlang@v1.3.0
+        uses: dlang-community/setup-dlang@v2
         with:
           compiler: ${{ matrix.dc }}
       - name: Build