Display hint to add PATH for Fish shell too (#14504)

tested on `fish 3.7.1 (released March 19, 2024)`
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Release Notes:

- N/A

script/install.sh

@@ -59,6 +59,9 @@ main() {
                 echo "   echo 'export PATH=\$HOME/.local/bin:\$PATH' >> ~/.zshrc"
                 echo "   source ~/.zshrc"
                 ;;
+            *fish)
+                echo "   fish_add_path -U $HOME/.local/bin"
+                ;;
             *)
                 echo "   echo 'export PATH=\$HOME/.local/bin:\$PATH' >> ~/.bashrc"
                 echo "   source ~/.bashrc"