[Fix] zsh: restore nomatch and markdirs rather than clobbering them

`unsetopt local_options nomatch` unsets both named options,
so LOCAL_OPTIONS is off by the time the function returns and the
`nomatch` change escapes into the caller's shell:
one `nvm ls` or `nvm alias` leaves NO_MATCH off for the rest of the session,
after which an unmatched glob is silently passed through as a literal.

`setopt local_options nonomatch`,
already used in `nvm_check_file_permissions`, restores on return.

The `markdirs` line also cancelled the snapshot
taken for `shwordsplit` on the line above it;
that one is latent,
as `nvm_ls` is only ever called inside a command substitution.

nvm.sh

@@ -1389,7 +1389,7 @@ nvm_list_aliases() {
     NVM_HAS_COLORS=1
   fi
 
-  nvm_is_zsh && unsetopt local_options nomatch
+  nvm_is_zsh && setopt local_options nonomatch
   (
     local ALIAS_PATH
     for ALIAS_PATH in "${NVM_ALIAS_DIR}/${ALIAS}"*; do
@@ -1685,7 +1685,7 @@ nvm_ls() {
     esac
 
     nvm_is_zsh && setopt local_options shwordsplit
-    nvm_is_zsh && unsetopt local_options markdirs
+    nvm_is_zsh && setopt local_options nomarkdirs
 
     local NVM_DIRS_TO_SEARCH1
     NVM_DIRS_TO_SEARCH1=''