chore(default-config): remove Tencent Cloud block rule

Tencent Cloud's abuse team reached out to me recently and asked for this
rule to be removed. Prior attempts to reach out to them to report
abusive traffic have failed, thus leading to this IP space block as a
last resort to try and maintain uptime for systems administrators.

Unfortunately, it's difficult for Tencent's abuse team to take action if
there is a blanket block like this. Let's see if this doesn't cause too
much grief.

data/bots/_deny-pathological.yaml

@@ -4,4 +4,3 @@
 - import: (data)/bots/custom-async-http-client.yaml
 - import: (data)/crawlers/alibaba-cloud.yaml
 - import: (data)/crawlers/huawei-cloud.yaml
-- import: (data)/crawlers/tencent-cloud.yaml

docs/docs/CHANGELOG.md

@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 <!-- This changes the project to: -->
 
 - Fix `SERVE_ROBOTS_TXT` setting file after the double slash fix broke it.
+- Remove the default configuration rule to block Tencent cloud. If users see abuse from Tencent cloud IP ranges, please contact abuse@tencent.com and mention that you are using Anubis to protect your services. Please include source IP address, source port, timestamp, target IP address, target port, request headers (including the User-Agent header), and target endpoints/patterns.
 
 ## v1.23.0: Lyse Hext