FIXUP mawk

.github/workflows/ci.yml

@@ -197,7 +197,6 @@ jobs:
         file
         flac
         ftdump
-        gawk
         gettext-tools
         gifsicle
         gimp
@@ -208,6 +207,7 @@ jobs:
         libjpeg-turbo
         lzop
         man
+        mawk
         mkisofs
         mkvtoolnix
         mtd-utils
@@ -251,6 +251,8 @@ jobs:
         rm /usr/bin/python3
         ln -s python3.12 /usr/bin/python3
         python3 -m pip install --break-system-packages https://github.com/itkach/slob/archive/master.zip
+        # Set mawk as the default for test diversity
+        ln -s mawk /usr/bin/awk
     - name: 'Run tests'
       run: make check -k
     - name: 'Run tests with hush'