meta: Correct case and styling for "Launch new instance" and "windowNavigator"

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/merge_requests/392>

extensions/launch-new-instance/metadata.json.in

@@ -3,7 +3,7 @@
 "uuid": "@uuid@",
 "settings-schema": "@gschemaname@",
 "gettext-domain": "@gettext_domain@",
-"name": "Launch new instance",
+"name": "Launch New Instance",
 "description": "Always launch a new instance when clicking in the dash or the application view.\nThis extension is part of Classic Mode and is officially supported by GNOME. Please do not report bugs using the form below, use GNOME's GitLab instance instead.",
 "shell-version": [ "@shell_current@" ],
 "url": "@url@"

extensions/windowsNavigator/metadata.json.in

@@ -5,7 +5,7 @@
     "settings-schema": "@gschemaname@",
     "gettext-domain": "@gettext_domain@",
     "original-author": "zaspire@rambler.ru",
-    "name": "windowNavigator",
+    "name": "Window Navigator",
     "description": "Allow keyboard selection of windows and workspaces in overlay mode. <Ctrl>number selects a workspace, and <Alt>number selects a window.",
     "url": "@url@"
 }