.github: each workflow step resets back to the checked out dir

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

.github/workflows/build.yml

@@ -40,6 +40,7 @@ jobs:
           make
       - name: Install Check
         run: |
+          cd build/dir
           pwd
           DESTDIR=/tmp make V=1 install-strip
           tree /tmp
@@ -48,6 +49,7 @@ jobs:
           /tmp/sbin/syslogd -?
       - name: Build Example
         run: |
+          cd build/dir
           pwd
           mkdir -p /tmp/example
           cp -a example/example.* /tmp/example/
@@ -56,4 +58,5 @@ jobs:
           popd
       - name: Run Tests
         run: |
+          cd build/dir
           make check || (cat test/test-suite.log; false)