ci: add macOS 11 Big Sur

Remove all traces of Travis CI

Change-Id: I1839ae96e41678f722cba052a56ae7c54255defd
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 6fa581b..7e19491 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -2,8 +2,8 @@
 on:
   push:
     paths-ignore:
+      - '*.md'
       - '.mailmap'
-      - '.travis.yml'
   workflow_dispatch:
 
 permissions:
@@ -14,7 +14,7 @@
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-10.15, ubuntu-20.04]
+        os: [macos-11, ubuntu-20.04]
     runs-on: ${{ matrix.os }}
     env:
       JOB_NAME: Docs
@@ -25,8 +25,8 @@
       - name: Install dependencies
         run: |
           case ${RUNNER_OS} in
-            Linux) export NODE_LABELS="Linux Ubuntu Ubuntu-20.04" ;;
-            macOS) export NODE_LABELS="OSX OSX-10.15" ;;
+            Linux) export NODE_LABELS="Linux Ubuntu" ;;
+            macOS) export NODE_LABELS="OSX" ;;
           esac
           find .jenkins.d/ -type f -name '[1-9]*.sh' -exec chmod -x '{}' +
           ./.jenkins