build(deps-dev): bump rspec in /gemfiles/rails-main

Bumps [rspec](https://github.com/rspec/rspec-metagem) from 3.12.0 to 3.13.0.
- [Commits](rspec/rspec-metagem@v3.12.0...v3.13.0)

---
updated-dependencies:
- dependency-name: rspec
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gemfiles/rails-main/Gemfile

@@ -10,6 +10,6 @@ gem "rails", github: "rails/rails", branch: "main"
 group :development, :test do
   gem "combustion"
   gem "rake", "~> 13.0"
-  gem "rspec", "~> 3.0"
+  gem "rspec", "~> 3.13"
   gem "rspec-rails"
 end

gemfiles/rails-main/Gemfile.lock

@@ -117,7 +117,7 @@ GEM
     connection_pool (2.4.1)
     crass (1.0.6)
     date (3.3.4)
-    diff-lcs (1.5.0)
+    diff-lcs (1.5.1)
     drb (2.2.0)
       ruby2_keywords
     erubi (1.12.0)
@@ -183,18 +183,18 @@ GEM
       psych (>= 4.0.0)
     reline (0.4.2)
       io-console (~> 0.5)
-    rspec (3.12.0)
-      rspec-core (~> 3.12.0)
-      rspec-expectations (~> 3.12.0)
-      rspec-mocks (~> 3.12.0)
-    rspec-core (3.12.2)
-      rspec-support (~> 3.12.0)
-    rspec-expectations (3.12.3)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.0)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
-    rspec-mocks (3.12.6)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
+      rspec-support (~> 3.13.0)
     rspec-rails (6.1.1)
       actionpack (>= 6.1)
       activesupport (>= 6.1)
@@ -203,7 +203,7 @@ GEM
       rspec-expectations (~> 3.12)
       rspec-mocks (~> 3.12)
       rspec-support (~> 3.12)
-    rspec-support (3.12.1)
+    rspec-support (3.13.0)
     ruby2_keywords (0.0.5)
     stringio (3.1.0)
     thor (1.3.0)
@@ -225,7 +225,7 @@ DEPENDENCIES
   pry-byebug
   rails!
   rake (~> 13.0)
-  rspec (~> 3.0)
+  rspec (~> 3.13)
   rspec-rails
   texd!