mu: Update to 1.12.1

**Summary**
- ensure CLD2 is actually used
- insist --maildir is absolute
- tweak mu4e-compose
- add 'display-buffer option for mu4e-compose-switch
- fix typos, update mu4e documentation

**Test Plan**
- search and view message

**Checklist**
- [X] Package was built and tested against unstable

packages/m/mu/package.yml

@@ -1,8 +1,8 @@
 name       : mu
-version    : 1.12.0
-release    : 21
+version    : 1.12.1
+release    : 22
 source     :
-    - https://github.com/djcb/mu/releases/download/v1.12.0/mu-1.12.0.tar.xz : 55072bea9fe378c14728bd0c0d199f6ed62847b0031bd908eb277c6d3621e7cd
+    - https://github.com/djcb/mu/releases/download/v1.12.1/mu-1.12.1.tar.xz : 2954404807adc7dfb8142cb1706197898a33bc9e7ce1dbee62211cddb2e634a2
 license    : GPL-3.0-only
 homepage   : https://www.djcbsoftware.nl/code/mu/
 component  : editor

packages/m/mu/pspec_x86_64.xml

@@ -103,9 +103,9 @@
         </Files>
     </Package>
     <History>
-        <Update release="21">
-            <Date>2024-02-24</Date>
-            <Version>1.12.0</Version>
+        <Update release="22">
+            <Date>2024-03-07</Date>
+            <Version>1.12.1</Version>
             <Comment>Packaging update</Comment>
             <Name>Nazar Stasiv</Name>
             <Email>nazar@autistici.org</Email>