Try this

Author: jrfnl

.github/workflows/validate.yml

@@ -186,6 +186,6 @@ jobs:
         uses: jacobtomlinson/gha-find-replace@v3
         with:
           include: "**/*.php"
-          find: "\\bTokens::\\$"
-          replace: ""
+          find: '\bTokens::\$'
+          replace: ''
           regex: true