doc: fix some doxygen warnings

doc/dox/internals/design.dox

@@ -51,7 +51,7 @@ See \ref page_module_protocol_native for details.
 The functionality of the server is implemented and extended with modules and
 extensions. Modules are server side bits of logic that hook into various
 places to provide extra features. This mostly means controlling the processing
-graph in some way. See \ref page_pipewire_modules for a list of current
+graph in some way. See \ref page_modules for a list of current
 modules.
 
 Extensions are the client side version of the modules. Most extensions provide

doc/dox/programs/spa-acp-tool.1.md

@@ -22,7 +22,7 @@ Show available commands
 \par quit | q
 Quit
 
-\par card <id> | c <id>
+\par card ID | c ID
 Probe card
 
 \par info | i
@@ -34,40 +34,40 @@ List all objects
 \par list-verbose | lv
 List all data
 
-\par list-profiles [id] | lpr [id]
+\par list-profiles [ID] | lpr [ID]
 List profiles
 
-\par set-profile <id> | spr <id>
+\par set-profile ID | spr ID
 Activate a profile
 
-\par list-ports [id] | lp [id]
+\par list-ports [ID] | lp [ID]
 List ports
 
-\par set-port <id> | sp <id>
+\par set-port ID | sp ID
 Activate a port
 
-\par list-devices [id] | ld [id]
+\par list-devices [ID] | ld [ID]
 List available devices
 
-\par get-volume <id> | gv <id>
+\par get-volume ID | gv ID
 Get volume from device
 
-\par set-volume <id> <vol> | v <id> <vol>
+\par set-volume ID VOL | v ID VOL
 Set volume on device
 
-\par inc-volume <id> | v+ <id>
+\par inc-volume ID | v+ ID
 Increase volume on device
 
-\par dec-volume <id> | v- <id>
+\par dec-volume ID | v- ID
 Decrease volume on device
 
-\par get-mute <id> | gm <id>
+\par get-mute ID | gm ID
 Get mute state from device
 
-\par set-mute <id> <val> | sm <id> <val>
+\par set-mute ID VAL | sm ID VAL
 Set mute on device
 
-\par toggle-mute <id>  | m <id>
+\par toggle-mute ID  | m ID
 Toggle mute on device
 
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