Update to Ruby 2.6.4 to address 2 CVEs

https://www.ruby-lang.org/en/news/2019/08/28/multiple-jquery-vulnerabilities-in-rdoc/

Signed-off-by: Tim Smith <tsmith@chef.io>

components/gems/Gemfile.lock

@@ -77,7 +77,7 @@ GEM
     aws-sdk-ecr (1.20.0)
       aws-sdk-core (~> 3, >= 3.61.1)
       aws-sigv4 (~> 1.1)
-    aws-sdk-ecs (1.47.0)
+    aws-sdk-ecs (1.48.0)
       aws-sdk-core (~> 3, >= 3.61.1)
       aws-sigv4 (~> 1.1)
     aws-sdk-eks (1.24.0)
@@ -134,7 +134,7 @@ GEM
     aws-sdk-route53resolver (1.10.0)
       aws-sdk-core (~> 3, >= 3.61.1)
       aws-sigv4 (~> 1.1)
-    aws-sdk-s3 (1.47.0)
+    aws-sdk-s3 (1.48.0)
       aws-sdk-core (~> 3, >= 3.61.1)
       aws-sdk-kms (~> 1)
       aws-sigv4 (~> 1.1)

omnibus/Gemfile.lock

@@ -28,8 +28,8 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
     artifactory (3.0.5)
     awesome_print (1.8.0)
     aws-eventstream (1.0.3)
@@ -42,7 +42,7 @@ GEM
     aws-sdk-kms (1.24.0)
       aws-sdk-core (~> 3, >= 3.61.1)
       aws-sigv4 (~> 1.1)
-    aws-sdk-s3 (1.47.0)
+    aws-sdk-s3 (1.48.0)
       aws-sdk-core (~> 3, >= 3.61.1)
       aws-sdk-kms (~> 1)
       aws-sigv4 (~> 1.1)
@@ -258,7 +258,7 @@ GEM
     plist (3.5.0)
     progressbar (1.10.1)
     proxifier (1.0.3)
-    public_suffix (3.1.1)
+    public_suffix (4.0.1)
     rack (2.0.7)
     retryable (3.0.4)
     ruby-progressbar (1.10.1)

omnibus_overrides.rb

@@ -20,7 +20,7 @@
 override "makedepend", version: "1.0.5"
 override "ncurses", version: "5.9"
 override "pkg-config-lite", version: "0.28-1"
-override "ruby", version: "2.6.3"
+override "ruby", version: "2.6.4"
 override "ruby-windows-devkit-bash", version: "3.1.23-4-msys-1.0.18"
 override "util-macros", version: "1.19.0"
 override "xproto", version: "7.0.28"