Use the canonical git server name (git.teletypegames.org)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

README.md

@@ -30,14 +30,14 @@ spirit as [tic80-tools](../tic80-tools).
 ## Builder image
 
 `builder.Dockerfile` bakes the pipeline's build-step dependencies
-(ACME assembler + make) into `git.teletype.hu/internal/c64-builder`,
+(ACME assembler + make) into `git.teletypegames.org/internal/c64-builder`,
 so the build step no longer runs `apt-get` on every run (VICE is a
 local-dev tool only and is not included):
 
 ```sh
 docker build --platform linux/amd64 -f builder.Dockerfile \
-  -t git.teletype.hu/internal/c64-builder:latest .
-docker push git.teletype.hu/internal/c64-builder:latest
+  -t git.teletypegames.org/internal/c64-builder:latest .
+docker push git.teletypegames.org/internal/c64-builder:latest
 ```
 
 The pipeline uploads `$(PROJECT)-$(VERSION).prg` and