Remove last traces of short -p pager flag (#228)

I missed some occurrences in #217.

src/main.rs

@@ -160,7 +160,7 @@ fn configure_pager(_: bool) {
 
 #[cfg(target_os = "windows")]
 fn configure_pager(enable_styles: bool) {
-    print_warning(enable_styles, "-p / --pager flag not available on Windows!");
+    print_warning(enable_styles, "--pager flag not available on Windows!");
 }
 
 /// The cache should get updated if this was requested by the user, or if auto

zsh_tealdeer

@@ -23,7 +23,7 @@ _tealdeer() {
         "($I -L --language)"{-L,--language}"[Override the language settings]:lang"
         "($I -u --update)"{-u,--update}"[Update the local cache]"
         "($I -c --clear-cache)"{-c,--clear-cache}"[Clear the local cache]"
-        "($I -p --pager)"{-p,--pager}"[Use a pager to page output]"
+        "($I)--pager[Use a pager to page output]"
         "($I -r --raw)"{-r,--raw}"[Display the raw markdown instead of rendering it]"
         "($I -q --quiet)"{-q,--quiet}"[Suppress informational messages]"
         "($I)--show-paths[Show file and directory paths used by tealdeer]"