Update alphagov/govuk-infrastructure digest to d086c56

Author: govuk-ci

.github/workflows/actionlint.yml

@@ -11,4 +11,4 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           show-progress: false
-      - uses: alphagov/govuk-infrastructure/.github/actions/actionlint@788b98389ac2003202dc421f4ccd187ad85cda17 # main
+      - uses: alphagov/govuk-infrastructure/.github/actions/actionlint@d086c56033720cdf4db2af8688979982a8961817 # main

.github/workflows/build_diff_gen_image.yaml

@@ -14,7 +14,7 @@ on:
 jobs:
   build-and-publish-image:
     name: Build and publish image
-    uses: alphagov/govuk-infrastructure/.github/workflows/build-and-push-multiarch-image.yml@788b98389ac2003202dc421f4ccd187ad85cda17 # main
+    uses: alphagov/govuk-infrastructure/.github/workflows/build-and-push-multiarch-image.yml@d086c56033720cdf4db2af8688979982a8961817 # main
     with:
       gitRef: ${{ inputs.gitRef || github.ref }}
       dockerfilePath: diff-generator/Dockerfile