Update dependency jekyll-feed to v0.17.0 (#1227)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| jekyll-feed | minor | `0.15.1` -> `0.17.0` |

---

### Configuration

📅 **Schedule**: Branch creation - "before 6am on wednesday" in timezone
Australia/Sydney, Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://app.renovatebot.com/dashboard#github/google/osv.dev).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNS40OC4yIiwidXBkYXRlZEluVmVyIjoiMzUuNDguMiJ9-->

docs/Gemfile.lock

@@ -6,7 +6,7 @@ GEM
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
       tzinfo (~> 2.0)
-    addressable (2.8.1)
+    addressable (2.8.4)
       public_suffix (>= 2.0.2, < 6.0)
     coffee-script (2.4.1)
       coffee-script-source