Upgrading: Fix "dnf list --extras" command

The old invocation with "dnf list extras" is unsuported in DNF5. It's
also terrible with DNF4 because you could have a package called
"extras".

modules/ROOT/pages/installing-mysql-mariadb.adoc

@@ -48,7 +48,7 @@ via their communication channels: https://www.mysql.com/about/faq/
 === Installing MySQL on Fedora
 
 ----
-sudo dnf install mysql-community-server
+sudo dnf install mysql-server
 ----
 
 === Start MySQL Service and Enable at login:

modules/ROOT/pages/kernel-build-custom.adoc

@@ -138,8 +138,9 @@ git switch f28
 picked up during the build automatically.
 
 .. Patches can also be kept in seperate files and added to `kernel.spec` with
-`Patch2: foo.patch`, `Patch3: bar.patch`, etc. They should be applied
-automatically during the build process.
+`Patch2: foo.patch`, `Patch3: bar.patch`, etc. Matching `ApplyOptionalPatch foo.patch`,
+`ApplyOptionalPatch bar.patch` lines must be added to apply the patches during
+the build process.
 
 .. To make your own modifications to the kernel source, retrieve the kernel
 sources for your current dist-git branch with `fedpkg sources`, then make

modules/ROOT/pages/upgrading-fedora-offline.adoc

@@ -205,7 +205,7 @@ To see a list of these packages do:
 
 [source,bash]
 ----
-sudo dnf list extras
+sudo dnf list --extras
 ----
 
 If you see a package you do not need, or use, you can remove it with: