Upgrade: Bump redis from 5.0.6 to 5.0.8 (#4262)

Bumps [redis](https://github.com/redis/redis-rb) from 5.0.6 to 5.0.8.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/redis/redis-rb/blob/master/CHANGELOG.md">redis's
changelog</a>.</em></p>
<blockquote>
<h1>5.0.8</h1>
<ul>
<li>Fix <code>Redis#without_reconnect</code> for sentinel clients. Fix
<a
href="https://redirect.github.com/redis/redis-rb/issues/1212">#1212</a>.</li>
<li>Add <code>sentinel_username</code>, <code>sentinel_password</code>
for sentinel clients. Bump <code>redis-client</code> to
<code>&gt;=0.17.0</code>. See <a
href="https://redirect.github.com/redis/redis-rb/issues/1213">#1213</a></li>
</ul>
<h1>5.0.7</h1>
<ul>
<li>Fix compatibility with <code>redis-client 0.15.0</code> when using
Redis Sentinel. Fix <a
href="https://redirect.github.com/redis/redis-rb/issues/1209">#1209</a>.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/redis/redis-rb/commit/2b183addb9175641a48e1d8616772282a31c0532"><code>2b183ad</code></a>
Release 5.0.8</li>
<li><a
href="https://github.com/redis/redis-rb/commit/230a5c446dd55300895efb6560ca64f053657a70"><code>230a5c4</code></a>
Merge pull request <a
href="https://redirect.github.com/redis/redis-rb/issues/1227">#1227</a>
from supercaracal/add-sharded-pubsub-support</li>
<li><a
href="https://github.com/redis/redis-rb/commit/54e6a7ebeed68dcd5ef6f37cf15e652debee6345"><code>54e6a7e</code></a>
Add sharded Pub/Sub support for cluster</li>
<li><a
href="https://github.com/redis/redis-rb/commit/ccdf15f4e99eb0bf8f7cc41d5afe6d7dd2782dff"><code>ccdf15f</code></a>
Merge pull request <a
href="https://redirect.github.com/redis/redis-rb/issues/1226">#1226</a>
from supercaracal/support-transaction-for-cluster-cl...</li>
<li><a
href="https://github.com/redis/redis-rb/commit/dda95f8fc3e92dec24356714c071719cd9e9c5ea"><code>dda95f8</code></a>
Support transactions for cluster client</li>
<li><a
href="https://github.com/redis/redis-rb/commit/c888c749ba4bd6151d03edac48981fb742fa4e83"><code>c888c74</code></a>
Merge pull request <a
href="https://redirect.github.com/redis/redis-rb/issues/1225">#1225</a>
from afinzel/master</li>
<li><a
href="https://github.com/redis/redis-rb/commit/ad0f30be44f6be2dafb7a67c277df62c449e6243"><code>ad0f30b</code></a>
Update default timeout docs</li>
<li><a
href="https://github.com/redis/redis-rb/commit/8e9183a299a523571670a30119b425a2fe2d9158"><code>8e9183a</code></a>
Update sentinel auth with explicit kwargs (<a
href="https://redirect.github.com/redis/redis-rb/issues/1221">#1221</a>)</li>
<li><a
href="https://github.com/redis/redis-rb/commit/01de51a59b2a44bafdc3672051e4dc4066a39bf0"><code>01de51a</code></a>
Merge pull request <a
href="https://redirect.github.com/redis/redis-rb/issues/1222">#1222</a>
from supercaracal/fix-cluster</li>
<li><a
href="https://github.com/redis/redis-rb/commit/ea4d04ab8c0aba595577c7df17274bbfcad80ec8"><code>ea4d04a</code></a>
Fix redis-clustering gem to pass the test with latest dependencies</li>
<li>Additional commits viewable in <a
href="https://github.com/redis/redis-rb/compare/v5.0.6...v5.0.8">compare
view</a></li>
</ul>
</details>
<br />


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</details>

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -404,9 +404,9 @@ GEM
       activesupport (>= 6.1.5)
       i18n
     redcarpet (3.6.0)
-    redis (5.0.6)
-      redis-client (>= 0.9.0)
-    redis-client (0.17.1)
+    redis (5.0.8)
+      redis-client (>= 0.17.0)
+    redis-client (0.18.0)
       connection_pool
     regexp_parser (2.8.2)
     reline (0.3.3)