Bump net-http-persistent from 4.0.5 to 4.0.6

Bumps [net-http-persistent](https://github.com/drbrain/net-http-persistent) from 4.0.5 to 4.0.6.
- [Release notes](https://github.com/drbrain/net-http-persistent/releases)
- [Changelog](https://github.com/drbrain/net-http-persistent/blob/master/History.txt)
- [Commits](drbrain/net-http-persistent@v4.0.5...v4.0.6)

---
updated-dependencies:
- dependency-name: net-http-persistent
  dependency-version: 4.0.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -299,8 +299,8 @@ GEM
     nested_form (0.3.2)
     net-http (0.6.0)
       uri
-    net-http-persistent (4.0.5)
-      connection_pool (~> 2.2)
+    net-http-persistent (4.0.6)
+      connection_pool (~> 2.2, >= 2.2.4)
     net-imap (0.5.8)
       date
       net-protocol
@@ -874,7 +874,7 @@ CHECKSUMS
   multi_xml (0.7.2) sha256=307a96dc48613badb7b2fc174fd4e62d7c7b619bc36ea33bfd0c49f64f5787ce
   nested_form (0.3.2) sha256=b1c468d7eac781235861c2f74fc9f675df0c4d915d5724aaf7fd29f7891c0538
   net-http (0.6.0) sha256=9621b20c137898af9d890556848c93603716cab516dc2c89b01a38b894e259fb
-  net-http-persistent (4.0.5) sha256=6e42880b347e650ffeaf679ae59c9d5a6ed8a22cda6e1b959d9c270050aefa8e
+  net-http-persistent (4.0.6) sha256=2abb3a04438edf6cb9e0e7e505969605f709eda3e3c5211beadd621a2c84dd5d
   net-imap (0.5.8) sha256=52aa5fdfc1a8a3df1f793b20a327e95b5a9dfe1d733e1f0d53075d2dbcfcf593
   net-pop (0.1.2) sha256=848b4e982013c15b2f0382792268763b748cce91c9e91e36b0f27ed26420dff3
   net-protocol (0.2.2) sha256=aa73e0cba6a125369de9837b8d8ef82a61849360eba0521900e2c3713aa162a8