Update README for v1.6.0

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: kyleconroy

README.md

@@ -12,8 +12,8 @@ version: '2'
 plugins:
 - name: golang
   wasm:
-    url: https://downloads.sqlc.dev/plugin/sqlc-gen-go_1.5.0.wasm
-    sha256: 4ca52949f4dc04b55188439f5de0ae20af2a71e3534b87907f2a7f466bda59ec
+    url: https://downloads.sqlc.dev/plugin/sqlc-gen-go_1.6.0.wasm
+    sha256: 3e54bb8ba8911e939d0f67ddccb710f79799e72e0c51516586414b3f3be12cfc
 sql:
 - schema: schema.sql
   queries: query.sql
@@ -84,8 +84,8 @@ version: 2
 plugins:
 - name: golang
   wasm:
-    url: https://downloads.sqlc.dev/plugin/sqlc-gen-go_1.3.0.wasm
-    sha256: e8206081686f95b461daf91a307e108a761526c6768d6f3eca9781b0726b7ec8
+    url: https://downloads.sqlc.dev/plugin/sqlc-gen-go_1.6.0.wasm
+    sha256: 3e54bb8ba8911e939d0f67ddccb710f79799e72e0c51516586414b3f3be12cfc
 sql:
 - schema: "query.sql"
   queries: "query.sql"
@@ -139,8 +139,8 @@ version: "2"
 plugins:
 - name: golang
   wasm:
-    url: https://downloads.sqlc.dev/plugin/sqlc-gen-go_1.3.0.wasm
-    sha256: e8206081686f95b461daf91a307e108a761526c6768d6f3eca9781b0726b7ec8
+    url: https://downloads.sqlc.dev/plugin/sqlc-gen-go_1.6.0.wasm
+    sha256: 3e54bb8ba8911e939d0f67ddccb710f79799e72e0c51516586414b3f3be12cfc
 options:
   golang:
     rename: