workaround for #95

v1.28.2 adds the following banner before the json output.

```
======================================================
tfsec is joining the Trivy family

tfsec will continue to remain available
for the time being, although our engineering
attention will be directed at Trivy going forward.

You can read more here:
aquasecurity/tfsec#1994
======================================================
v1.28.2
```

this script removes the banner.

.github/workflows/tests.yml

@@ -128,8 +128,9 @@ jobs:
 
   test-operating-systems:
     strategy:
-       matrix:
-         platform: [ubuntu-latest, macos-latest, windows-latest]
+      fail-fast: false
+      matrix:
+        platform: [ubuntu-latest, macos-latest, windows-latest]
     name: tfsec (${{ matrix.platform }})
     runs-on: ${{ matrix.platform }}
 

script.sh

@@ -70,6 +70,11 @@ echo '::group:: Running tfsec with reviewdog 🐶 ...'
 
   # shellcheck disable=SC2086
   "${TFSEC_PATH}/tfsec" --format=json ${INPUT_TFSEC_FLAGS:-} . \
+    | {
+      # workaround for #95
+      # remove "tfsec is joining the Trivy family" banner
+      perl -E 'undef $/; my $txt = <>; $txt =~ s/^[^{]*//m; print $txt'
+    } \
     | jq -r -f "${GITHUB_ACTION_PATH}/to-rdjson.jq" \
     |  "${REVIEWDOG_PATH}/reviewdog" -f=rdjson \
         -name="tfsec" \
@@ -79,7 +84,7 @@ echo '::group:: Running tfsec with reviewdog 🐶 ...'
         -filter-mode="${INPUT_FILTER_MODE}" \
         ${INPUT_FLAGS}
 
-  tfsec_return="${PIPESTATUS[0]}" reviewdog_return="${PIPESTATUS[2]}" exit_code=$?
+  tfsec_return="${PIPESTATUS[0]}" reviewdog_return="${PIPESTATUS[3]}" exit_code=$?
   echo "tfsec-return-code=${tfsec_return}" >> "$GITHUB_OUTPUT"
   echo "reviewdog-return-code=${reviewdog_return}" >> "$GITHUB_OUTPUT"
 echo '::endgroup::'