feat: replace - separator with . in identifier (#273)

* replace `-` separator with `.`
Big thanks to @p4perf4ce for contributing.

Signed-off-by: Rishav Dhar <19497993+RDhar@users.noreply.github.com>

* reorder `tf_tool` positioning in `tf_identifier`

Signed-off-by: Rishav Dhar <19497993+RDhar@users.noreply.github.com>

---------

Signed-off-by: Rishav Dhar <19497993+RDhar@users.noreply.github.com>

action.js

@@ -29,18 +29,18 @@ module.exports = async ({ context, core, exec, github }) => {
 
   // Unique identifier of the TF run for later retrieval.
   const tf_identifier = [
+    process.env.tf_tool,
     pr_number,
     process.env.arg_chdir,
     process.env.arg_workspace_alt,
     process.env.arg_backend_config,
     process.env.arg_var_file,
     process.env.arg_destroy,
-    process.env.tf_tool,
     process.env.arg_out,
   ]
     .filter((arg) => arg)
     .map((arg) => String(arg).replace(/[^a-zA-Z0-9]/g, "-"))
-    .join("-");
+    .join(".");
   core.setOutput("identifier", tf_identifier);
 
   // Capture TF command input and outputs.