MainWindow: Update 'Documentation' URL (#1349)

* MainWindow: Update 'Documentation' URL

angr-management now has its own docs site, so point to it.

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

angrmanagement/ui/main_window.py

@@ -253,7 +253,9 @@ def open_newstate_dialog(self) -> None:
         new_state_dialog.exec_()
 
     def open_doc_link(self) -> None:
-        QDesktopServices.openUrl(QUrl("https://docs.angr.io/", QUrl.ParsingMode.TolerantMode))
+        QDesktopServices.openUrl(
+            QUrl("https://angr-management.readthedocs.io/en/latest/", QUrl.ParsingMode.TolerantMode)
+        )
 
     def open_about_dialog(self) -> None:
         dlg = LoadAboutDialog()