Update rspec in Gemfile.lock

This eliminates these Ruby warnings:

```
/root/.rbenv/versions/3.1.4/lib/ruby/gems/3.1.0/gems/rspec-core-3.6.0/lib/rspec/core/configuration_options.rb:171: warning: Passing safe_level with the 2nd argument of ERB.new is deprecated. Do not use it, and specify other arguments as keyword arguments.
/root/.rbenv/versions/3.1.4/lib/ruby/gems/3.1.0/gems/rspec-core-3.6.0/lib/rspec/core/configuration_options.rb:171: warning: Passing trim_mode with the 3rd argument of ERB.new is deprecated. Use keyword argument like ERB.new(str, trim_mode: ...) instead.
```

Gemfile.lock

@@ -8,7 +8,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.1)
-    diff-lcs (1.3)
+    diff-lcs (1.5.0)
     google-protobuf (3.23.4)
     parallel (1.20.1)
     parser (2.7.2.0)
@@ -19,19 +19,19 @@ GEM
     rake (13.0.3)
     rake-compiler (0.9.9)
       rake
-    rspec (3.6.0)
-      rspec-core (~> 3.6.0)
-      rspec-expectations (~> 3.6.0)
-      rspec-mocks (~> 3.6.0)
-    rspec-core (3.6.0)
-      rspec-support (~> 3.6.0)
-    rspec-expectations (3.6.0)
+    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)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.6.0)
-    rspec-mocks (3.6.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.6.0)
-    rspec-support (3.6.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
     rubocop (0.49.1)
       parallel (~> 1.10)
       parser (>= 2.3.3.1, < 3.0)