Update and rename gh_labels.yaml to label.yaml

Author: romancardenas

riscv-rt/.github/workflows/gh_labels.yaml renamed to riscv-rt/.github/workflows/label.yaml

@@ -1,4 +1,5 @@
 name: Check Labels
+
 on:
   merge_group:
   pull_request:
@@ -15,4 +16,3 @@ jobs:
           labels: "work in progress, do not merge"
           add_comment: true
           message: "This PR is being prevented from merging because it presents one of the blocking labels: {{ provided }}."
-