fix: repo namestapce in README

Author: ysyneu

README.md

@@ -130,7 +130,7 @@ docker run -d \
   -e FLASHDUTY_RUNNER_API_KEY=your_api_key \
   -e FLASHDUTY_RUNNER_NAME=my-runner \
   -v /var/flashduty/workspace:/workspace \
-  ghcr.io/flashcatcloud/flashduty-runner:latest
+  registry.flashcat.cloud/public/flashduty-runner:latest
 ```
 
 ### Configuration

README_zh.md

@@ -130,7 +130,7 @@ docker run -d \
   -e FLASHDUTY_RUNNER_API_KEY=your_api_key \
   -e FLASHDUTY_RUNNER_NAME=my-runner \
   -v /var/flashduty/workspace:/workspace \
-  ghcr.io/flashcatcloud/flashduty-runner:latest
+  registry.flashcat.cloud/public/flashduty-runner:latest
 ```
 
 ### 配置