CI: track changes in examples (#4211)

Note: this will help us greatly with the maintenance of
the new pyaedt-examples projects. At short term it
will alleviate the pain of tracking changes in the
examples while working on the repo. In the long term,
it could be leveraged to trigger specific workflows
on the pyaedt-examples repo

.github/labeler.yml

@@ -30,3 +30,8 @@ edb:
     - "examples/05-Q3D/Q3D_DC_IR.py"
     - "pyaedt/edb_core/**/*"
     - "pyaedt/edb.py"
+
+examples:
+- changed-files:
+  - any-glob-to-any-file:
+    - "examples/**/*"

.github/labels.yml

@@ -33,3 +33,7 @@
 - name: edb
   description: Anything related to the EDB API
   color: C4C25D
+
+- name: examples
+  description: Anything related to the examples
+  color: 3C2E5F