term: Rename println to println_prefixed

This function was mistakenly called `println`, despite it also wanting
a prefix.

Rename the function so that it better reflects its behaviour.

crates/radicle-cli/src/commands/sync.rs

@@ -578,7 +578,7 @@ fn display_success<'a>(
     verbose: bool,
 ) {
     for (node, updates, _) in results {
-        term::println(
+        term::println_prefixed(
             "🌱 Fetched from",
             term::format::secondary(term::format::node_id_human(node)),
         );

crates/radicle-term/src/io.rs

@@ -249,7 +249,7 @@ pub fn usage(name: &str, usage: &str) {
     ));
 }
 
-pub fn println(prefix: impl fmt::Display, msg: impl fmt::Display) {
+pub fn println_prefixed(prefix: impl fmt::Display, msg: impl fmt::Display) {
     print(format_args!("{prefix} {msg}"));
 }