Merge branch 'su0' into 'main'

hugo: installer links go to latest release

See merge request !644

hugo/config.toml

@@ -20,7 +20,7 @@ PygmentsStyle = "vs"
   url_doc = "https://bornagainproject.org/ext/files/latest"
   url_userapi = "https://bornagainproject.org/ext/api/git-main/user-API"
   version_mm = "git-main"
-  version_mmp = "git-main"
+  version_mmp = "1.9.0"
   manual_version = "1.7.2"
   recommended_python_major = "3"
   recommended_python_minor = "9"

hugo/content/installation/building/unix/get-source.md

@@ -10,7 +10,7 @@ weight = 20
 Download the [BornAgain source tarball]({{< ref-tarball >}}) and unpack it:
 ```bash
 $ cd <some_directory>
-$ tar xfz BornAgain-1.17.0.tar.gz
+$ tar xfz {{< ref-tarball >}}
 ```
 
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