Clarify job name in validation job

Author: richardbuckle

.github/workflows/validate_xml.yml

@@ -13,8 +13,8 @@ on:
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
-  # This workflow contains a single job called "build"
-  build:
+  # This workflow contains a single job called "validate"
+  validate:
     # The type of runner that the job will run on
     runs-on: ubuntu-latest
 
@@ -29,4 +29,4 @@ jobs:
         with:
           path: "files/INTO\ Bindings/DeviceButtonMaps/"
           file-endings: ".buttonMap"
-  
+