Remove $ from invalidPathRegex (#2090)

* Remove $ from invalidPathRegex

Problem: `@graphql-codegen` silently ignore paths with `$`.
Solution: remove `$` from `invalidPathRegex`

* changeset

Co-authored-by: Arda TANRIKULU <ardatanrikulu@gmail.com>

Author: dizel3d

Diff for: .changeset/odd-moons-hunt.md

@@ -0,0 +1,5 @@
+---
+'@graphql-tools/utils': patch
+---
+
+fix(utils): Remove \$ from invalidPathRegex

Diff for: packages/utils/src/helpers.ts

@@ -42,7 +42,7 @@ export function isDocumentString(str: string): boolean {
   return false;
 }
 
-const invalidPathRegex = /[‘“!$%&^<=>`]/;
+const invalidPathRegex = /[‘“!%&^<=>`]/;
 export function isValidPath(str: string): boolean {
   return typeof str === 'string' && !invalidPathRegex.test(str);
 }