Addition of lockup icon, adjustments to logo and mark (#1165)

* Addition of lockup icon

* Exported as 75 the first time

* Add changeset

* Adding lockup-github

* Change @primer/octicons version to minor

Updated version for @primer/octicons to minor and modified the change log entries.

---------

Co-authored-by: simurai <simurai@github.com>
Co-authored-by: Marie Lucca <40550942+francinelucca@users.noreply.github.com>

Author: 3 people

.changeset/lemon-suns-stare.md

@@ -0,0 +1,6 @@
+---
+"@primer/octicons": minor
+---
+
+- Addition of lockup icon
+- adjustments to logo and mark

icons/lockup-github-16.svg

@@ -147,6 +147,7 @@
   "list-unordered": ["bullet", "point", "tasks", "todo", "items"],
   "location": ["here", "marker"],
   "lock": ["secure", "safe", "protected"],
+  "lockup-github": ["brand", "github", "logo"],
   "logo-gist": ["brand", "github", "logo"],
   "logo-github": ["brand", "github", "logo"],
   "loop": ["loops", "automation", "repeat", "node", "actions", "copilot"],

icons/lockup-github-24.svg

@@ -207,6 +207,7 @@ exports[`@primer/octicons-react should not update exports without a semver chang
   "ListUnorderedIcon",
   "LocationIcon",
   "LockIcon",
+  "LockupGithubIcon",
   "LogIcon",
   "LogoGistIcon",
   "LogoGithubIcon",