Fix broken man page links

Fixes: #3086

README.md

@@ -5,7 +5,7 @@ and `zypper` that generates customized disk images with a number of
 bells and whistles.
 
 For a longer description and available features and options, see the
-[man page](mkosi/resources/man/mkosi.md).
+[man page](mkosi/resources/man/mkosi.1.md).
 
 <a href="https://repology.org/project/mkosi/versions">
     <img align="right" src="https://repology.org/badge/vertical-allrepos/mkosi.svg?exclude_sources=site&exclude_unsupported=1" alt="Packaging status">

blog/content/a-reintroduction-to-mkosi.md

@@ -378,7 +378,7 @@ extension image.
 
 There's many more features that we won't go over in detail here in this
 blog post. Learn more about those by reading the
-[documentation](https://github.com/systemd/mkosi/blob/main/mkosi/resources/man/mkosi.md).
+[documentation](https://github.com/systemd/mkosi/blob/main/mkosi/resources/man/mkosi.1.md).
 
 ## Conclusion
 

docs/distribution-policy.md

@@ -50,7 +50,7 @@ used:
   necessary methods.
 - Update any relevant methods on the `Distribution` enum to take the new
   distribution into account.
-- Update the documentation in `mkosi/resources/man/mkosi.md`
+- Update the documentation in `mkosi/resources/man/mkosi.1.md`
 - Update the default initrd, tools and default image configurations in
   `mkosi/resources/mkosi-initrd`, `mkosi/resources/mkosi-tools` and
   `mkosi.conf.d` respectively. If the distribution is a variant of

mkosi/resources/man/mkosi.1.md

@@ -173,8 +173,8 @@ The following command line verbs are known:
     file `mkosi.1` into the `mkosi/resources` directory of the Python
     package, if it is missing, as well as to install it in the appropriate
     search path for man pages. The man page can be generated from the
-    markdown file `mkosi/resources/man/mkosi.md` e.g via
-    `pandoc -t man -s -o mkosi.1 mkosi.md`.
+    markdown file `mkosi/resources/man/mkosi.1.md` e.g via
+    `pandoc -t man -s -o mkosi.1 mkosi.1.md`.
 
 `dependencies`
 :   Output the list of packages required by mkosi to build and boot