chore(deps-dev): Bump kamal from 1.7.3 to 2.1.2

Bumps [kamal](https://github.com/basecamp/kamal) from 1.7.3 to 2.1.2.
- [Release notes](https://github.com/basecamp/kamal/releases)
- [Commits](basecamp/kamal@v1.7.3...v2.1.2)

---
updated-dependencies:
- dependency-name: kamal
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Gemfile.lock

@@ -87,7 +87,7 @@ GEM
     brakeman (6.1.2)
       racc
     builder (3.3.0)
-    concurrent-ruby (1.3.3)
+    concurrent-ruby (1.3.4)
     connection_pool (2.4.1)
     crass (1.0.6)
     cssbundling-rails (1.4.0)
@@ -97,13 +97,13 @@ GEM
       irb (~> 1.10)
       reline (>= 0.3.8)
     diff-lcs (1.5.1)
-    dotenv (2.8.1)
+    dotenv (3.1.4)
     drb (2.2.1)
     ed25519 (1.3.0)
     erubi (1.13.0)
     globalid (1.2.1)
       activesupport (>= 6.1)
-    i18n (1.14.5)
+    i18n (1.14.6)
       concurrent-ruby (~> 1.0)
     io-console (0.7.2)
     irb (1.13.2)
@@ -115,17 +115,16 @@ GEM
     jsbundling-rails (1.3.0)
       railties (>= 6.0.0)
     json (2.7.2)
-    kamal (1.7.3)
+    kamal (2.1.2)
       activesupport (>= 7.0)
       base64 (~> 0.2)
       bcrypt_pbkdf (~> 1.0)
       concurrent-ruby (~> 1.2)
-      dotenv (~> 2.8)
+      dotenv (~> 3.1)
       ed25519 (~> 1.2)
       net-ssh (~> 7.0)
-      sshkit (>= 1.22.2, < 2.0)
-      thor (~> 1.2)
-      x25519 (~> 1.0, >= 1.0.10)
+      sshkit (>= 1.23.0, < 2.0)
+      thor (~> 1.3)
       zeitwerk (~> 2.5)
     language_server-protocol (3.17.0.3)
     loofah (2.22.0)
@@ -138,7 +137,7 @@ GEM
       net-smtp
     marcel (1.0.4)
     mini_mime (1.1.5)
-    minitest (5.24.1)
+    minitest (5.25.1)
     msgpack (1.7.2)
     net-imap (0.4.14)
       date
@@ -151,7 +150,7 @@ GEM
       net-ssh (>= 5.0.0, < 8.0.0)
     net-smtp (0.5.0)
       net-protocol
-    net-ssh (7.2.3)
+    net-ssh (7.3.0)
     nio4r (2.7.3)
     nokogiri (1.16.6-aarch64-linux)
       racc (~> 1.4)
@@ -165,6 +164,7 @@ GEM
       racc (~> 1.4)
     nokogiri (1.16.6-x86_64-linux)
       racc (~> 1.4)
+    ostruct (0.6.0)
     parallel (1.25.1)
     parser (3.3.3.0)
       ast (~> 2.4.1)
@@ -284,16 +284,17 @@ GEM
       actionpack (>= 6.1)
       activesupport (>= 6.1)
       sprockets (>= 3.0.0)
-    sshkit (1.23.0)
+    sshkit (1.23.1)
       base64
       net-scp (>= 1.1.2)
       net-sftp (>= 2.1.2)
       net-ssh (>= 2.8.0)
+      ostruct
     stimulus-rails (1.3.3)
       railties (>= 6.0.0)
     stringio (3.1.1)
     strscan (3.1.0)
-    thor (1.3.1)
+    thor (1.3.2)
     timeout (0.4.1)
     turbo-rails (2.0.5)
       actionpack (>= 6.0.0)
@@ -312,8 +313,7 @@ GEM
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
-    x25519 (1.0.10)
-    zeitwerk (2.6.16)
+    zeitwerk (2.6.18)
 
 PLATFORMS
   aarch64-linux