fix: Fix docker-image address (#96)

Author: limakzi

README.md

@@ -20,19 +20,19 @@
 * Run a container:
 
 ```
-docker run -it ghcr.io/limakzi/gap-docker:4.13.1-full
+docker run -it ghcr.io/limakzi/gap:4.13.1-full
 ```
 
 ```
-docker run -it ghcr.io/limakzi/gap-docker:4.14.0-full
+docker run -it ghcr.io/limakzi/gap:4.14.0-full
 ```
 
 ```
-docker run -it ghcr.io/limakzi/gap-docker:4.13.1-bare
+docker run -it ghcr.io/limakzi/gap:4.13.1-bare
 ```
 
 ```
-docker run -it ghcr.io/limakzi/gap-docker:4.14.0-bare
+docker run -it ghcr.io/limakzi/gap:4.14.0-bare
 ```