build(deps): bump devise_invitable from 2.0.6 to 2.0.9 in /backend

Bumps [devise_invitable](https://github.com/scambra/devise_invitable) from 2.0.6 to 2.0.9.
- [Changelog](https://github.com/scambra/devise_invitable/blob/master/CHANGELOG.md)
- [Commits](scambra/devise_invitable@v2.0.6...v2.0.9)

---
updated-dependencies:
- dependency-name: devise_invitable
  dependency-type: direct:production
...

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

backend/Gemfile.lock

@@ -143,7 +143,7 @@ GEM
       devise (~> 4.0)
       railties (~> 7.0)
       rotp (~> 6.0)
-    devise_invitable (2.0.6)
+    devise_invitable (2.0.9)
       actionmailer (>= 5.0)
       devise (>= 4.6)
     diff-lcs (1.5.0)
@@ -340,20 +340,20 @@ GEM
     memoist (0.16.2)
     method_source (1.0.0)
     mini_magick (4.11.0)
-    mini_mime (1.1.2)
+    mini_mime (1.1.5)
     mini_portile2 (2.8.5)
-    minitest (5.21.2)
+    minitest (5.22.2)
     msgpack (1.5.1)
     multi_json (1.15.0)
     multipart-post (2.1.1)
-    net-imap (0.4.6)
+    net-imap (0.4.10)
       date
       net-protocol
     net-pop (0.1.2)
       net-protocol
     net-protocol (0.2.2)
       timeout
-    net-smtp (0.4.0)
+    net-smtp (0.4.0.1)
       net-protocol
     nio4r (2.7.0)
     nokogiri (1.16.2)
@@ -571,7 +571,7 @@ GEM
     websocket-extensions (0.1.5)
     xpath (3.2.0)
       nokogiri (~> 1.8)
-    zeitwerk (2.6.12)
+    zeitwerk (2.6.13)
 
 PLATFORMS
   ruby