Upgrade RubyGems/Bundler to 4.0.14 for Ruby 3.2+

Ruby 3.2–3.5 move from RubyGems 3.7.2 (Bundler 2.7.2) to 4.0.14.
Ruby 4.0 gets a patch bump from 4.0.6 to 4.0.14.

RubyGems/Bundler 4.0.x requires Ruby >= 3.2, so older Rubies stay
on their current series (already at the latest compatible patch).

All variants updated (gnu, musl, centos) for consistency.

Author: TonyCTHsu

src/engines/ruby/3.2/Dockerfile.centos

@@ -174,7 +174,7 @@ rm -r /usr/src/ruby
 if yum list installed ruby; then exit 1; fi
 
 # update gem version
-gem update --system 3.7.2
+gem update --system 4.0.14
 
 # rough smoke test
 ruby --version

src/engines/ruby/3.2/Dockerfile.gnu

@@ -153,7 +153,7 @@ rm -r /usr/src/ruby
 if dpkg -l ruby 2>/dev/null | grep -q '^ii'; then exit 1; fi
 
 # update gem version
-gem update --system 3.7.2
+gem update --system 4.0.14
 
 # rough smoke test
 ruby --version

src/engines/ruby/3.2/Dockerfile.musl

@@ -31,7 +31,7 @@ RUN true "${REPRO_RUN_KEY}" && apk update
 ENV LANG en_US.UTF-8
 
 ## Install a pinned RubyGems and Bundler
-RUN gem update --system 3.7.2
+RUN gem update --system 4.0.14
 
 # Install additional gems that are in CRuby but missing from the above
 # JRuby install distribution. These are version-pinned for reproducibility.

src/engines/ruby/3.3/Dockerfile.centos

@@ -174,7 +174,7 @@ rm -r /usr/src/ruby
 if yum list installed ruby; then exit 1; fi
 
 # update gem version
-gem update --system 3.7.2
+gem update --system 4.0.14
 
 # rough smoke test
 ruby --version

src/engines/ruby/3.3/Dockerfile.gnu

@@ -153,7 +153,7 @@ rm -r /usr/src/ruby
 if dpkg -l ruby 2>/dev/null | grep -q '^ii'; then exit 1; fi
 
 # update gem version
-gem update --system 3.7.2
+gem update --system 4.0.14
 
 # rough smoke test
 ruby --version

src/engines/ruby/3.3/Dockerfile.musl

@@ -31,7 +31,7 @@ RUN true "${REPRO_RUN_KEY}" && apk update
 ENV LANG en_US.UTF-8
 
 ## Install a pinned RubyGems and Bundler
-RUN gem update --system 3.7.2
+RUN gem update --system 4.0.14
 
 # Install additional gems that are in CRuby but missing from the above
 # JRuby install distribution. These are version-pinned for reproducibility.

src/engines/ruby/3.4/Dockerfile.centos

@@ -174,7 +174,7 @@ rm -r /usr/src/ruby
 if yum list installed ruby; then exit 1; fi
 
 # update gem version
-gem update --system 3.7.2
+gem update --system 4.0.14
 
 # rough smoke test
 ruby --version

src/engines/ruby/3.4/Dockerfile.gnu

@@ -153,7 +153,7 @@ rm -r /usr/src/ruby
 if dpkg -l ruby 2>/dev/null | grep -q '^ii'; then exit 1; fi
 
 # update gem version
-gem update --system 3.7.2
+gem update --system 4.0.14
 
 # rough smoke test
 ruby --version

src/engines/ruby/3.4/Dockerfile.musl

@@ -31,7 +31,7 @@ RUN true "${REPRO_RUN_KEY}" && apk update
 ENV LANG en_US.UTF-8
 
 ## Install a pinned RubyGems and Bundler
-RUN gem update --system 3.7.2
+RUN gem update --system 4.0.14
 
 # Install additional gems that are in CRuby but missing from the above
 # JRuby install distribution. These are version-pinned for reproducibility.

src/engines/ruby/3.5/Dockerfile.centos

@@ -200,7 +200,7 @@ rm -r /usr/src/ruby
 if yum list installed ruby; then exit 1; fi
 
 # update gem version
-gem update --system 3.7.2
+gem update --system 4.0.14
 
 # rough smoke test
 ruby --version