CI: ignore shellcheck's SC2086 error

Ignore the "Double quote to prevent globbing and word splitting" error
from shellcheck. Script authors should have knowledge whether the
variable can contain spaces or shell glob symbols or not.

Signed-off-by: Dmitry Baryshkov <[email protected]>

Author: lumag

.github/workflows/static-checks.yml

@@ -61,6 +61,10 @@ jobs:
         run: |
           # Run shellcheck against all files outside .git/ that `file` reports
           # as text/x-shellscript
+          #
+          # Ignore the double quoting warning, script authors have better
+          # knowledge of variable contents.
+          export SHELLCHECK_OPTS="-e SC2086"
           find . -path ./.git -prune -o -print0 | \
             xargs -0n1 sh -c 'test "$(file --brief --mime-type "$1")" = "text/x-shellscript" && printf "%s\000" "$1"' -- | \
             xargs -0t shellcheck