ci: quote Windows SSH key paths

Jenkinsfile

@@ -115,15 +115,22 @@ print('versions.json updated: symbolicator = ${env.IMAGE_VERSION}')
           keyFileVariable: 'GIT_SSH_KEY'
         )]) {
           script {
-            bat """
-              chcp 65001 >nul
-              set "GIT_SSH_COMMAND=ssh -i %GIT_SSH_KEY% -o IdentitiesOnly=yes"
-              git config user.email "jenkins@xuqm.com"
-              git config user.name "Jenkins CI"
-              git add ${env.VERSION_FILE}
-              git diff --cached --quiet || git commit -m "ci: bump ${env.IMAGE_NAME} to ${env.IMAGE_VERSION} [skip ci]"
-              git push origin HEAD:main
-            """
+            writeFile file: 'git-ssh.cmd',
+              text: '@echo off\r\nssh -i "%GIT_SSH_KEY%" -o IdentitiesOnly=yes %*\r\n'
+            try {
+              withEnv(["GIT_SSH=${pwd()}\\git-ssh.cmd"]) {
+                bat """
+                  chcp 65001 >nul
+                  git config user.email "jenkins@xuqm.com"
+                  git config user.name "Jenkins CI"
+                  git add ${env.VERSION_FILE}
+                  git diff --cached --quiet || git commit -m "ci: bump ${env.IMAGE_NAME} to ${env.IMAGE_VERSION} [skip ci]"
+                  git push origin HEAD:main
+                """
+              }
+            } finally {
+              bat 'if exist git-ssh.cmd del /q git-ssh.cmd'
+            }
           }
         }
       }