feat(release): v7.20.0 release (#1135)

Author: wing328

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

@@ -289,9 +289,16 @@ export class VersionManagerService {
   }
 
   versions : Version[] = [
+    {
+      version: '7.20.0',
+      versionTags: [ '7.20.0', 'stable', 'latest' ],
+      releaseDate: new Date("2026-02-16T06:24:58.285Z"),
+      installed: false,
+      downloadLink: 'https://repo1.maven.org/maven2/org/openapitools/openapi-generator-cli/7.20.0/openapi-generator-cli-7.20.0.jar'
+    },
     {
       version: '7.19.0',
-      versionTags: [ '7.19.0', 'stable', 'latest' ],
+      versionTags: [ '7.19.0', 'stable' ],
       releaseDate: new Date("2026-01-20T06:24:58.285Z"),
       installed: false,
       downloadLink: 'https://repo1.maven.org/maven2/org/openapitools/openapi-generator-cli/7.19.0/openapi-generator-cli-7.19.0.jar'