fix(datasource/dotnet): add sourceurl (#18386)

Co-authored-by: Michael Kriese <michael.kriese@visualon.de>

lib/modules/datasource/dotnet/index.spec.ts

@@ -125,6 +125,7 @@ describe('modules/datasource/dotnet/index', () => {
       });
 
       expect(res).toBeDefined();
+      expect(res?.sourceUrl).toBe('https://github.com/dotnet/sdk');
       expect(res?.releases).toHaveLength(17);
       expect(res?.releases).toIncludeAllPartialMembers([
         { version: '3.1.100-preview1-014459' },
@@ -158,6 +159,7 @@ describe('modules/datasource/dotnet/index', () => {
       });
 
       expect(res).toBeDefined();
+      expect(res?.sourceUrl).toBe('https://github.com/dotnet/runtime');
       expect(res?.releases).toHaveLength(17);
       expect(res?.releases).toIncludeAllPartialMembers([
         { version: '3.1.0-preview1.19506.1' },

lib/modules/datasource/dotnet/index.ts

@@ -65,7 +65,12 @@ export class DotnetDatasource extends Datasource {
         }
       }
 
-      result = { releases };
+      const sourceUrl =
+        packageName === 'dotnet-sdk'
+          ? 'https://github.com/dotnet/sdk'
+          : 'https://github.com/dotnet/runtime';
+
+      result = { releases, sourceUrl };
     }
 
     return result;