docs: fix terraform example in the README file

Fixes terraform example in the `README.md` file with adding
`fpjs_integration_path_escaped` variable.

Related-Task: INTER-2047

Author: erayaydin

README.md

@@ -47,6 +47,11 @@ This is a quick overview of the installation setup. For detailed step-by-step in
             value = "YOUR_INTEGRATION_PATH_HERE" # any random string that's a valid URL
             type = "string"
           }
+          variables {
+            name  = "fpjs_integration_path_escaped"
+            value = "YOUR_INTEGRATION_PATH_ESCAPED_HERE" # same as fpjs_integration_path but with / escaped as \\/ and . escaped as \.
+            type = "string"
+          }
           variables {
             name  = "fpjs_proxy_secret"
             value = "YOUR_PROXY_SECRET_HERE" # Use the proxy secret from the previous step