Update README.md

Author: kyleconroy

README.md

@@ -8,8 +8,8 @@ version: '2'
 plugins:
 - name: golang
   wasm:
-    url: "https://example.com"
-    sha256: ""
+    url: https://downloads.sqlc.dev/plugin/sqlc-gen-go_1.0.0.wasm
+    sha256: dbe302a0208afd31118fffcc268bd39b295655dfa9e3f385d2f4413544cfbed1
 sql:
 - schema: schema.sql
   queries: query.sql
@@ -20,4 +20,4 @@ sql:
     options:
       package: db
       sql_package: pgx/v5
-```
+```