fix: move rules_diff above SNIP

It doesn't need to be in user install instructions.

Fixes #613

Author: alexeagle

example/WORKSPACE.bazel

@@ -58,6 +58,13 @@ http_archive(
     url = "https://github.com/aspect-build/rules_js/releases/download/v2.0.0/rules_js-v2.0.0.tar.gz",
 )
 
+http_archive(
+    name = "rules_diff",
+    integrity = "sha256-44r/+iFWzPOOMlWHR4ExLVmGU99Wlkiho9JxkadUK3Q=",
+    strip_prefix = "rules_diff-v1.0.0",
+    url = "https://gitlab.arm.com/bazel/rules_diff/-/releases/v1.0.0/downloads/src.tar.gz",
+)
+
 http_archive(
     name = "rules_shell",
     sha256 = "b15cc2e698a3c553d773ff4af35eb4b3ce2983c319163707dddd9e70faaa062d",
@@ -356,10 +363,3 @@ multitool(
         "@aspect_rules_lint//lint:multitool.lock.json",
     ],
 )
-
-http_archive(
-    name = "rules_diff",
-    integrity = "sha256-44r/+iFWzPOOMlWHR4ExLVmGU99Wlkiho9JxkadUK3Q=",
-    strip_prefix = "rules_diff-v1.0.0",
-    url = "https://gitlab.arm.com/bazel/rules_diff/-/releases/v1.0.0/downloads/src.tar.gz",
-)