Use sed instead of patch for char limit

CHANGELOG

@@ -885,17 +885,3 @@
 * Update dependencies
 * Fix remote statuses with large media descriptions being rejected ([#39135](https://github.com/tootsuite/mastodon/issues/39135) by [@ClearlyClaire](https://github.com/ClearlyClaire))
 
-[1.18.0]
-* Update mastodon to 4.6.0
-* [Full Changelog](https://github.com/mastodon/mastodon/releases/tag/v4.6.0)
-* Add collections ([#37992](https://github.com/tootsuite/mastodon/issues/37992) and others) - Create collections with up to 25 accounts each, then share them with others.
-* Add email subscriptions ([#38163](https://github.com/tootsuite/mastodon/issues/38163) and others) - Admins can allow specific roles to enable email subscriptions on their profile.
-* Add new overview landing page setting ([#39074](https://github.com/tootsuite/mastodon/issues/39074) and others) - Admins can choose a new frontpage for anonymous visitors.
-* Add ability to require 2FA for specific roles (including Everybody) ([#37701](https://github.com/tootsuite/mastodon/issues/37701) and others)
-* Remove support for EOL Node version 20 ([#38926](https://github.com/tootsuite/mastodon/issues/38926) by [@mjankowski](https://github.com/mjankowski))
-* Remove support for Ruby 3.2 ([#37476](https://github.com/tootsuite/mastodon/issues/37476) by [@mjankowski](https://github.com/mjankowski))
-* Remove support for ImageMagick ([#37488](https://github.com/tootsuite/mastodon/issues/37488) by [@mjankowski](https://github.com/mjankowski))
-* Change invitations to only bypass sign-up approval setting when the issuer of the invitation has the `invite_bypass_approval` permission ([#38278](https://github.com/tootsuite/mastodon/issues/38278) by [@ClearlyClaire](https://github.com/ClearlyClaire))
-* Fix filters not being applied to search results in web UI ([#36346](https://github.com/tootsuite/mastodon/issues/36346) by [@ClearlyClaire](https://github.com/ClearlyClaire))
-* Fix remote posts with large media descriptions being rejected ([#39135](https://github.com/tootsuite/mastodon/issues/39135) by [@ClearlyClaire](https://github.com/ClearlyClaire))
-

CloudronManifest.json

@@ -5,8 +5,8 @@
   "description": "file://DESCRIPTION.md",
   "changelog": "file://CHANGELOG",
   "tagline": "Federated social network",
-  "version": "1.18.0",
-  "upstreamVersion": "4.6.0",
+  "version": "1.17.12",
+  "upstreamVersion": "4.5.11",
   "healthCheckPath": "/about",
   "httpPort": 8000,
   "memoryLimit": 1610612736,

Dockerfile

@@ -68,7 +68,7 @@ RUN mkdir -p /app/code /app/pkg
 WORKDIR /app/code
 
 # renovate: datasource=github-releases depName=tootsuite/mastodon versioning=semver extractVersion=^v(?<version>.+)$
-ARG MASTODON_VERSION=4.6.0
+ARG MASTODON_VERSION=4.5.11
 
 ENV RAILS_ENV production
 ENV NODE_ENV production