change up the verbiage with something that works (tested)

Signed-off-by: Adam Warner <me@adamwarner.co.uk>

automated install/basic-install.sh

@@ -217,10 +217,13 @@ os_check() {
             printf "  %b %bUnsupported OS detected%b\\n" "${CROSS}" "${COL_LIGHT_RED}" "${COL_NC}"
             printf "      https://docs.pi-hole.net/main/prerequesites/#supported-operating-systems\\n"
             printf "\\n"
-            printf "      This check can be skipped by setting the environment variable %bPIHOLE_SKIP_OS_CHECK%b to %btrue%b\\n" "${COL_LIGHT_RED}" "${COL_NC}" "${COL_LIGHT_RED}" "${COL_NC}"
-            printf "      e.g: 'sudo PIHOLE_SKIP_OS_CHECK=true curl -sSL https://install.pi-hole.net | bash'\\n"
-            printf "      or   'sudo PIHOLE_SKIP_OS_CHECK=true pihole -up'\\n"
-            printf "      By setting this variable to true you acknowledge there may be issues with Pi-hole during or after the install\\n"
+            printf "      e.g: If you are seeing this message on a fresh install, you can run:"
+            printf "             'PIHOLE_SKIP_OS_CHECK=true curl -sSL https://install.pi-hole.net | sudo -E bash'\\n"
+            printf "\\n"
+            printf "           If you are seeing this message after having run pihole -up:\\n"
+            printf "             'PIHOLE_SKIP_OS_CHECK=true sudo -E pihole -r'\\n"
+            printf "           (In this case, your previous run of pihole -up will have already updated the local repository)\\n"
+            printf "\\n"
             printf "      If that is the case, you can feel free to ask the community on Discourse with the %bCommunity Help%b category:\\n" "${COL_LIGHT_RED}" "${COL_NC}"
             printf "      https://discourse.pi-hole.net/c/bugs-problems-issues/community-help/\\n"
             exit 1