Docs: Improve `borg init` encryption table formatting

docs/borg_theme/css/borg.css

@@ -131,6 +131,17 @@ table.docutils.borg-options-table tr td:first-child:not([colspan="3"]) {
     text-align: center;
 }
 
+.borg-encryption-table th,
+.borg-encryption-table td {
+    vertical-align: top;
+}
+
+.borg-encryption-table .literal {
+    display: block;
+    margin: 0;
+    white-space: normal;
+}
+
 kbd, /* used in usage pages for options */
 code,
 .rst-content tt.literal,