labels: Update the for the primitive library names.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>

.github/labels.yml

diff --git a/.github/labels.yml b/.github/labels.yml
index 221fa99..30c8c0f 100644
--- a/.github/labels.yml
+++ b/.github/labels.yml
@@ -152,18 +152,10 @@
   color: "c5d53c"
 
 # Primitives
-- name: "lib-sky130_fd_pr_base"
+- name: "lib-sky130_fd_pr"
   description: "Issues with the base primitive cells provided by the SkyWater foundry."
   color: "c5d53c"
 
-- name: "lib-sky130_fd_pr_rf"
-  description: "Issues with the rf primitive cells provided by the SkyWater foundry."
-  color: "c5d53c"
-
-- name: "lib-sky130_fd_pr_rf2"
-  description: "Issues with the rf2 primitive cells provided by the SkyWater foundry."
-  color: "c5d53c"
-
 # Standard cells
 - name: "lib-sky130_fd_sc_hd"
   description: "Issues with the \"high density\" digital standard cells provided by the SkyWater foundry."