docs: use 'go build .' in getting-started tutorials

docs/tutorials/getting-started-mysql.md

@@ -169,7 +169,7 @@ Before this code will compile you'll need to fetch the relevant MySQL driver:
 
 ```shell
 go get github.com/go-sql-driver/mysql
-go build ./...
+go build .
 ```
 
 The program should compile without errors. To make that possible, sqlc generates

docs/tutorials/getting-started-postgresql.md

@@ -188,7 +188,7 @@ package, but in this tutorial we've used `pgx/v5`:
 
 ```shell
 go get github.com/jackc/pgx/v5
-go build ./...
+go build .
 ```
 
 The program should compile without errors. To make that possible, sqlc generates

docs/tutorials/getting-started-sqlite.md

@@ -190,7 +190,7 @@ Before this code will compile you'll need to fetch the relevant SQLite driver:
 
 ```shell
 go get modernc.org/sqlite
-go build ./...
+go build .
 ```
 
 The program should compile without errors, and run successfully. To make that