chore(deps) bump lua-resty-acme from ~> 0.6 to == 0.7.1

### Summary

#### bug fixes
- ***:** popup errors from lower functions [a19e9c8](fffonion/lua-resty-acme@a19e9c8)
- **autossl:** pass storage config to acme client ([#43](fffonion/lua-resty-acme#43)) [ef1e541](fffonion/lua-resty-acme@ef1e541)

#### features
- **autossl:** add challenge_start_delay [df4ba0b](fffonion/lua-resty-acme@df4ba0b)
- **autossl:** check if domain is whitelisted before cert renewal ([#35](fffonion/lua-resty-acme#35)) [942c007](fffonion/lua-resty-acme@942c007)
- **client:** add challenge_start_callback [1c9b2d5](fffonion/lua-resty-acme@1c9b2d5)
- **client:** allow to read "alternate" link and select preferred chain ([#42](fffonion/lua-resty-acme#42)) [ff17a74](fffonion/lua-resty-acme@ff17a74)
- **storage/vault:** add support for kubernetes auth ([#37](fffonion/lua-resty-acme#37)) [93c2121](fffonion/lua-resty-acme@93c2121)

Author: bungle

kong-2.5.0-0.rockspec

@@ -39,7 +39,7 @@ dependencies = {
   "lua-resty-openssl == 0.7.3",
   "lua-resty-counter == 0.2.1",
   "lua-resty-ipmatcher == 0.6",
-  "lua-resty-acme ~> 0.6",
+  "lua-resty-acme == 0.7.1",
   -- external Kong plugins
   "kong-plugin-azure-functions ~> 1.0",
   "kong-plugin-zipkin ~> 1.4",