work around a bug in ohmyzsh (#2152)

The bug was introduced here: ohmyzsh/ohmyzsh@3dd83a2

This causes Oh My Zsh to print \r to the terminal.

internal/p10k.zsh

@@ -6584,7 +6584,7 @@ function _p9k_clear_instant_prompt() {
       print -rn -- $terminfo[rc]${(%):-%b%k%f%s%u}$terminfo[ed]
       local unexpected=${(S)${${content//$'\e[?'<->'c'}//$'\e['<->' q'}//$'\e'[^$'\a\e']#($'\a'|$'\e\\')}
       # Visual Studio Code prints this garbage.
-      unexpected=${unexpected//$'\033[1;32mShell integration activated\033[0m\n'}
+      unexpected=${${unexpected//$'\033[1;32mShell integration activated\033[0m\n'}//$'\r'}
       if [[ -n $unexpected ]]; then
         local omz1='[Oh My Zsh] Would you like to update? [Y/n]: '
         local omz2='Updating Oh My Zsh'