Bump dockerfile-rails from 1.7.2 to 1.7.6

Bumps [dockerfile-rails](https://github.com/fly-apps/dockerfile-rails) from 1.7.2 to 1.7.6.
- [Release notes](https://github.com/fly-apps/dockerfile-rails/releases)
- [Commits](fly-apps/dockerfile-rails@v1.7.2...v1.7.6)

---
updated-dependencies:
- dependency-name: dockerfile-rails
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -88,7 +88,7 @@ GEM
     builder (3.3.0)
     childprocess (5.0.0)
     coderay (1.1.3)
-    concurrent-ruby (1.3.4)
+    concurrent-ruby (1.3.5)
     crack (1.0.0)
       bigdecimal
       rexml
@@ -111,7 +111,7 @@ GEM
       reline (>= 0.3.8)
     diff-lcs (1.5.1)
     diffy (3.4.3)
-    dockerfile-rails (1.7.2)
+    dockerfile-rails (1.7.6)
       rails (>= 3.0.0)
     dotenv (3.1.7)
     erubi (1.13.1)
@@ -149,7 +149,7 @@ GEM
       csv
       mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
-    i18n (1.14.6)
+    i18n (1.14.7)
       concurrent-ruby (~> 1.0)
     io-console (0.8.0)
     irb (1.14.3)
@@ -197,16 +197,16 @@ GEM
       net-protocol
     net-protocol (0.2.2)
       timeout
-    net-smtp (0.5.0)
+    net-smtp (0.5.1)
       net-protocol
     nio4r (2.7.4)
-    nokogiri (1.18.1-aarch64-linux-gnu)
+    nokogiri (1.18.2-aarch64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.18.1-arm64-darwin)
+    nokogiri (1.18.2-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.18.1-x86_64-darwin)
+    nokogiri (1.18.2-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.18.1-x86_64-linux-gnu)
+    nokogiri (1.18.2-x86_64-linux-gnu)
       racc (~> 1.4)
     notiffany (0.1.3)
       nenv (~> 0.1)