infra: Adding a couple more script releated labels.

 * `scripts-python-liberty` label for the script which generates the
   liberty timing files.

 * `scripts-python-verilog` label for the script which generates a lot
   of the verilog files.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>
diff --git a/.github/labels.yml b/.github/labels.yml
index 9bd2400..ac55372 100644
--- a/.github/labels.yml
+++ b/.github/labels.yml
@@ -210,6 +210,14 @@
   description: "Issues with the Python scripts provided as part of the PDK."
   color: "5648a8"
 
+- name: "scripts-python-liberty"
+  description: "Issues with the Python script which generates the liberty timing files."
+  color: "5648a8"
+
+- name: "scripts-python-verilog"
+  description: "Issues with the Python script which creates the generated Verilog files."
+  color: "5648a8"
+
 ##########################################################################
 # Labels related to tools
 #