Label padding updates to match PRC (#3058)

Co-authored-by: langermank <langermank@users.noreply.github.com>
Co-authored-by: Keith Cirkel <keithamus@users.noreply.github.com>

Author: langermank

.changeset/old-starfishes-sell.md

@@ -0,0 +1,5 @@
+---
+"@primer/view-components": patch
+---
+
+`Label` padding updates to match PRC

.playwright/screenshots/snapshots.test.ts-snapshots/primer/alpha/segmented_control/trailing_label_width_medium/default.png

@@ -10,13 +10,13 @@
 .label, /* TODO: Deprecate */
 .Label {
   display: inline-block;
-  padding: 0 7px;
+  padding: 0 var(--base-size-6);
   font-size: var(--text-body-size-small);
   font-weight: var(--base-text-weight-medium);
   line-height: 18px;
   white-space: nowrap;
   border: var(--borderWidth-thin) solid var(--borderColor-default);
-  border-radius: 2em;
+  border-radius: var(--borderRadius-full);
 
   &:hover {
     text-decoration: none;
@@ -26,8 +26,7 @@
 /* Large 24px */
 
 .Label--large {
-  padding-right: 10px;
-  padding-left: 10px;
+  padding: 0 var(--base-size-8);
   line-height: 22px;
 }