Fix out-of-scope `input` reference in try_emo_ji() (#2)

try_emo_ji() is a top-level helper (a lexical sibling of the Shiny
server closure), so `input$emoji$name` was unbound there and the
tryCatch() silently swallowed the error, making the 'try raw name
first' branch dead code. Use the `name` parameter, which already
holds input$emoji$name (passed by the caller).

Found via ry v0.6.1 RY010 (unbound-variable).

R/emoji_picker.R

 
 try_emo_ji <- function(name, session = shiny::getDefaultReactiveDomain()) {
   emo_ji <- tryCatch({
-    emo::ji(input$emoji$name)
-    paste0('emo::ji("', input$emoji$name, '")')
+    emo::ji(name)
+    paste0('emo::ji("', name, '")')
   },
     error = function(e) {
       NULL