Add Alteryx and DBT

Alteryx: simple-icons#5469
dbt:  simple-icons#5470

Gemfile.lock

@@ -9,7 +9,9 @@ GEM
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     eventmachine (1.2.7)
+    eventmachine (1.2.7-x64-mingw32)
     ffi (1.14.1)
+    ffi (1.14.1-x64-mingw32)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
     i18n (1.8.5)
@@ -53,16 +55,19 @@ GEM
     safe_yaml (1.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
+    sassc (2.4.0-x64-mingw32)
+      ffi (~> 1.9)
     terminal-table (2.0.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     unicode-display_width (1.7.0)
 
 PLATFORMS
   ruby
+  x64-mingw32
   x86_64-linux
 
 DEPENDENCIES
   jekyll (= 4.2)
 
 BUNDLED WITH
-  2.2.0
+   2.2.14

_data/simple-icons.json

@@ -360,6 +360,12 @@
             "hex": "0D597F",
             "source": "https://alpinelinux.org/"
         },
+        {
+            "title": "Alteryx",
+            "hex": "0089BC",
+            "source": "https://drive.google.com/file/d/1X18qbNGG5PH8M8bRsX2LD9PZmcjjGxi_/view?usp=sharing",
+            "guidelines": "https://www.alteryx.com/company/news/press-kit"
+        },
         {
             "title": "Altium Designer",
             "hex": "A5915F",
@@ -2093,6 +2099,12 @@
             "hex": "004F9F",
             "source": "https://dblp.org/"
         },
+        {
+            "title": "dbt",
+            "hex": "FF694B",
+            "source": "https://raw.githubusercontent.com/fishtown-analytics/dbt-styleguide/master/_includes/icons/dbt-logo-full-white.svg",
+            "guidelines": "https://github.com/fishtown-analytics/dbt-styleguide/tree/master/_includes/icons",
+        },
         {
             "title": "DC Entertainment",
             "hex": "0078F0",