Bump actionlint (#570)

Bump actionlint to [v1.7.3](https://github.com/rhysd/actionlint/releases/tag/v1.7.3).

Contributes to martincostello/repo-migrations#49.

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

.github/workflows/lint.yml

@@ -34,7 +34,7 @@ jobs:
       run: echo "::add-matcher::.github/actionlint-matcher.json"
 
     - name: Lint workflows
-      uses: docker://rhysd/actionlint@sha256:89d3f90f82781dee3c8724651129634b08cf2241bbd67fcd02a1c5198119fc5e # v1.7.2
+      uses: docker://rhysd/actionlint@sha256:7617f05bd698cd2f1c3aedc05bc733ccec92cca0738f3e8722c32c5b42c70ae6 # v1.7.3
       with:
         args: -color
 
@@ -43,4 +43,4 @@ jobs:
       with:
         config: '.markdownlint.json'
         globs: |
-          **/*.md
+          **/*.md