Fixed invalid solution name in build pipeline

Author: michaelstaib

.github/workflows/release.yml

@@ -21,7 +21,7 @@ jobs:
             10.x
 
       - name: 🔄  Restore
-        run: dotnet restore ChilliCream.Snowflake.sln
+        run: dotnet restore ChilliCream.Snowflake.slnx
 
       - name: 🏗️  Build
         run: dotnet build ChilliCream.Snowflake.sln --configuration Release --no-restore
@@ -45,7 +45,7 @@ jobs:
             10.x
 
       - name: 💾  Restore
-        run: dotnet restore ChilliCream.Snowflake.sln
+        run: dotnet restore ChilliCream.Snowflake.slnx
 
       - name: 🏗️  Build (Release)
         run: dotnet build src/ChilliCream.Snowflake.csproj -c Release --no-restore