docs(en): fix CLI references (no -t / --update flags; -b is a value option)

docs/en-US/configuration/themes.md

@@ -21,12 +21,6 @@ You can also import theme files. You can take inspiration from, or directly use,
 one of the themes bundled with termscp in the `themes/` directory of the
 repository. Import a theme by running:
 
-```sh
-termscp -t <theme_file>
-```
-
-This is also available as:
-
 ```sh
 termscp theme <theme_file>
 ```
@@ -54,7 +48,7 @@ are two quick fixes:
    patched, so download the updated theme from the repository and re-import it:
 
     ```sh
-    termscp -t <theme.toml>
+    termscp theme <theme.toml>
     ```
 
 2. Edit your theme by hand. If you use a custom theme, edit the file and add the

docs/en-US/getting-started/connecting.md

@@ -6,8 +6,8 @@ termscp can start in three different ways depending on the arguments you pass.
   parameters required to connect to the remote host.
 - An address argument: termscp skips the authentication form and connects
   directly to the remote host.
-- A bookmark name with `-b, --address-as-bookmark`: termscp resolves the
-  argument as a saved bookmark and connects.
+- A bookmark name with `-b <bookmark-name>`: termscp resolves the argument as a
+  saved bookmark and connects. Repeat `-b` to open several bookmarks.
 
 When you provide an address argument or a bookmark name, you can also provide a
 start working directory for the local host.

docs/en-US/getting-started/installation.md

@@ -77,7 +77,7 @@ enjoy all of its features.
 To update termscp to the latest version, run it from the command line with:
 
 ```sh
-(sudo) termscp --update
+(sudo) termscp update
 ```
 
 For all platforms and methods, see <https://termscp.rs/install>.