buffer: Keep the shorter language setting names for the common operation (#43915)

cc
https://github.com/zed-industries/zed/pull/43888#issuecomment-3597265087

Release Notes:

- N/A *or* Added/Fixed/Improved ...

crates/languages/src/bash.rs

@@ -40,7 +40,7 @@ mod tests {
         });
 
         cx.new(|cx| {
-            let mut buffer = Buffer::local("", cx).with_language_immediate(language, cx);
+            let mut buffer = Buffer::local("", cx).with_language(language, cx);
 
             let expect_indents_to =
                 |buffer: &mut Buffer, cx: &mut Context<Buffer>, input: &str, expected: &str| {