Update copy for the Electron Linux keyring backend error (#2295)

Author: t3chguy

src/i18n/strings/en_EN.json

@@ -61,7 +61,7 @@
             "unknown_backend_override_title": "Failed to load database",
             "unsupported_keyring": "Your system has an unsupported keyring meaning the database cannot be opened.",
             "unsupported_keyring_cta": "Use weaker encryption",
-            "unsupported_keyring_detail": "Electron's keyring detection did not find a supported backend, you may be able to convince it to use one on your system anyway, see %(link)s.",
+            "unsupported_keyring_detail": "Electron's keyring detection did not find a supported backend. You can attempt to manually configure the backend by starting %(brand)s with a command-line argument, a one-time operation. See %(link)s.",
             "unsupported_keyring_title": "System unsupported"
         }
     },

src/store.ts

@@ -266,6 +266,7 @@ class Store extends ElectronStore<StoreData> {
                         title: _t("store|error|unsupported_keyring_title"),
                         message: _t("store|error|unsupported_keyring"),
                         detail: _t("store|error|unsupported_keyring_detail", {
+                            brand: global.vectorConfig.brand || "Element",
                             link: "https://www.electronjs.org/docs/latest/api/safe-storage#safestoragegetselectedstoragebackend-linux",
                         }),
                         type: "error",