Authenticate requests when setting up `just` in CI (#10109)

In order to list available releases, `extractions/setup-just` has to
make API requests to the GitHub API. The official docs say that in some
circumstances, it is possible for the request to be rate-limited. Since
we might end up making many GitHub requests in CI (e.g when updating
dependencies) we have started bumping into this issue more and more.

Rate-limited requests fail the workflow's step. We have to manually
retry each step; this can end up wasting time for reviewers and it makes
dependency updates a bit harder to deal with. Rate limitations can be
avoided by running the action with our actions secret.

This change adds the 'GITHUB_TOKEN' environment variable to all three
places where we run `setup-just`.

Example of error message when we are rate limited:

"Error: API rate limit exceeded for <RUNNER-IP> (But here's the good
news: Authenticated requests get a higher rate limit. Check out the
documentation for more details.)"

Signed-off-by: Matei David <matei@buoyant.io>

.github/workflows/integration.yml

@@ -174,6 +174,8 @@ jobs:
           - v1.25
     steps:
       - uses: extractions/setup-just@95b912dc5d3ed106a72907f2f9b91e76d60bdb76
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - uses: olix0r/cargo-action-fmt/setup@9269f3aa1ff01775d95efc97037e2cbdb41d9684
       - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
       - uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a
@@ -353,6 +355,8 @@ jobs:
           - v1.25
     steps:
       - uses: extractions/setup-just@95b912dc5d3ed106a72907f2f9b91e76d60bdb76
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - uses: actions/setup-go@6edd4406fa81c3da01a34fa6f6343087c207a568
         with:
           go-version: '1.18'

.github/workflows/release.yml

@@ -214,6 +214,8 @@ jobs:
           echo "CMD=$CMD" >> "$GITHUB_ENV"
           "$CMD" version --client
       - uses: extractions/setup-just@95b912dc5d3ed106a72907f2f9b91e76d60bdb76
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - uses: azure/setup-kubectl@e1be5e75ed9741a7c467f4832ecb259a83174311
       - name: Setup k3d
         run: |