chore: update README and auto-generate vimdoc

Author: github-actions[bot]

doc/gp.nvim.txt

@@ -181,7 +181,7 @@ still supported for compatibility).
                 secret = {
                     "bash",
                     "-c",
-                    "cat ~/.config/github-copilot/hosts.json | sed -e 's/.*oauth_token...//;s/\".*//'",
+                    "cat ~/.config/github-copilot/apps.json | sed -e 's/.*oauth_token...//;s/\".*//'",
                 },
             },