Apply suggestions from code review

Co-authored-by: JEEVITHA KANNAN K S <ksjeevithakannan123@gmail.com>

Author: Angaddeep Singh

core/tabs/system-setup/fedora/fedora-upgrade.sh

@@ -6,7 +6,7 @@ current_version=$(rpm -E '%{fedora}')
 next_version=$((current_version + 1))
 
 update() {
-    printf "%b\n" "${RED}Make sure your system is fully updated; if not, update it first and reboot once.${RC}"
+    printf "%b\n" "${YELLOW}Make sure your system is fully updated; if not, update it first and reboot once.${RC}"
     printf "%b\n" "${CYAN}Your current Fedora version is $current_version.${RC}"
     printf "%b\n" "${CYAN}The next available version is $next_version.${RC}"
 
@@ -32,7 +32,7 @@ update() {
 
             case "$reboot_response" in
                 y|Y)
-                    printf "%b\n" "${GREEN}Rebooting to apply the upgrade...${RC}"
+                    printf "%b\n" "${YELLOW}Rebooting to apply the upgrade...${RC}"
                     "$ESCALATION_TOOL" "$PACKAGER" system-upgrade reboot
                     ;;
                 *)