Fix path formatting for Bun installation in Jenkinsfile

- Updated the path separator from backslashes to forward slashes for consistency across environments.
- Ensured the PATH variable is correctly set for Bun installation on Windows systems.

Jenkinsfile

@@ -17,10 +17,10 @@ def ensureBunInstalled() {
     } else {
         bat '''
             where bun >nul 2>nul || powershell -c "irm bun.sh/install.ps1 | iex"
-            set PATH=%USERPROFILE%\.bun\bin;%PATH%
+            set PATH=%USERPROFILE%/.bun/bin;%PATH%
             bun -v
         '''
-        env.PATH = "${env.USERPROFILE}\\.bun\\bin;${env.PATH}"
+        env.PATH = "${env.USERPROFILE}/.bun/bin;${env.PATH}"
     }
 }