chore: Add automatically generated annotation to dependencies.md (#8643)

## References
- Related to #8641 (comment)
- Closes #8641

Signed-off-by: Josh Soref <[email protected]>

Author: jsoref

DEPENDENCIES.md

@@ -1,3 +1,5 @@
+<!-- This file is automatically added by `scripts/dependency-graph.js`. Do not edit. -->
+
 # npm dependencies
 
 ## `github.com/npm/` only

scripts/dependency-graph.js

@@ -118,6 +118,8 @@ const main = async function () {
   const [annotationsAll] = walk(tree, false)
 
   const out = [
+    '<!-- This file is automatically added by `scripts/dependency-graph.js`. Do not edit. -->',
+    '',
     '# npm dependencies',
     '',
     '## `github.com/npm/` only',