fix(ci): Use port 5001 for go-libsql embedded replica tests

The embedded replica tests use gRPC protocol, which runs on port 5001.
The original CI was using port 8080 (HTTP/Hrana), which doesn't support
native gRPC (only gRPC-Web over HTTP/1.1).

This fixes the 'Timeout performing handshake with primary' error in the
golang-bindings CI job.

Author: devonshigaki

.github/workflows/golang-bindings.yml

@@ -89,4 +89,4 @@ jobs:
       working-directory: go-libsql
       run: go test -v -count=1 ./...
       env:
-        LIBSQL_PRIMARY_URL: "http://127.0.0.1:8080"
+        LIBSQL_PRIMARY_URL: "http://127.0.0.1:5001"