Bump actionlint (#165)

Bump actionlint to [v1.7.7](https://github.com/rhysd/actionlint/releases/tag/v1.7.7).

Contributes to martincostello/repo-migrations#64.

Signed-off-by: costellobot[bot] <102247573+costellobot[bot]@users.noreply.github.com>
Co-authored-by: costellobot[bot] <102247573+costellobot[bot]@users.noreply.github.com>

Author: costellobot[bot]

.github/workflows/build.yml

@@ -63,7 +63,7 @@ jobs:
       run: echo "::add-matcher::.github/actionlint-matcher.json"
 
     - name: Lint workflows
-      uses: docker://rhysd/actionlint@sha256:e3856d413f923accc4120884ff79f6bdba3dd53fd42884d325f21af61cc15ce0 # v1.7.6
+      uses: docker://rhysd/actionlint@sha256:887a259a5a534f3c4f36cb02dca341673c6089431057242cdc931e9f133147e9 # v1.7.7
       with:
         args: -color