feat(release): v7.15.0 release (#973)

* feat(release): v7.15.0 release

* chore(fix): fix tags

Author: wing328

apps/generator-cli/src/app/services/version-manager.service.ts

@@ -287,9 +287,16 @@ export class VersionManagerService {
   }
 
   versions : Version[] = [
+    {
+      version: '7.15.0',
+      versionTags: [ '7.15.0', 'stable', 'latest' ],
+      releaseDate: new Date("2025-08-22T06:24:58.285Z"),
+      installed: false,
+      downloadLink: 'https://repo1.maven.org/maven2/org/openapitools/openapi-generator-cli/7.15.0/openapi-generator-cli-7.15.0.jar'
+    },
     {
       version: '7.14.0',
-      versionTags: [ '7.14.0', 'stable', 'latest' ],
+      versionTags: [ '7.14.0', 'stable' ],
       releaseDate: new Date("2025-06-25T06:24:58.285Z"),
       installed: false,
       downloadLink: 'https://repo1.maven.org/maven2/org/openapitools/openapi-generator-cli/7.14.0/openapi-generator-cli-7.14.0.jar'