chore(deps): update actions/checkout action to v5

Ref: PACT-445

Author: pactflow-renovate-bot[bot]

.github/workflows/crawl-site.yml

@@ -14,5 +14,5 @@ jobs:
       PACTFLOW_ALGOLIA_KEY: ${{secrets.PACTFLOW_ALGOLIA_KEY}}
     name: Index PactFlow site
     steps:
-      - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
       - run: make crawl

.github/workflows/sync-docs.yml

@@ -89,7 +89,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: "2.7"