patch 9.0.0277: Coverity CI: update-alternatives not needed with Ubuntu 20.04

Problem:    Coverity CI: update-alternatives not needed with Ubuntu 20.04.
Solution:   Remove update-alternatives for Lua. (closes #10987)

.github/workflows/coverity.yml

@@ -50,12 +50,6 @@ jobs:
           echo "CONFOPT=--enable-perlinterp --enable-pythoninterp --enable-python3interp --enable-rubyinterp --enable-luainterp --enable-tclinterp"
           ) >> $GITHUB_ENV
 
-      - name: Set up system
-        run: |
-          # Setup lua5.3 manually since its package doesn't provide alternative.
-          # https://bugs.launchpad.net/ubuntu/+source/lua5.3/+bug/1707212
-          sudo update-alternatives --install /usr/bin/lua lua /usr/bin/lua5.3 10
-
       - name: Configure
         run: |
           ./configure --with-features=huge ${CONFOPT} --enable-fail-if-missing

src/version.c

@@ -723,6 +723,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    277,
 /**/
     276,
 /**/