git/ci: Avoid commenting with '""' for build with no deps.

Closes #9040

Signed-off-by: Andrew Clemons <[email protected]>

.github/workflows/ci.yml

@@ -165,10 +165,10 @@ jobs:
         run: |
           {
             printf '#### reverse dependencies - %s\n\n' "$MATRIX_DIR"
-            if [[ "$DEP_RESPONSE" == "" ]] ; then
+            if [[ "$DEP_RESPONSE" == '""' ]] ; then
               printf 'None\n'
             else
-              printf '%s' "$DEP_RESPONSE" | sed 's/\\n/\n/g' | sort | sed 's/^/- [ ] /'
+              printf '%s' "$DEP_RESPONSE" | sed 's/^""//;s/\\n/\n/g' | sort | sed 's/^/- [ ] /'
             fi
           } > comment-output
         shell: