Document the `spot_tags` parameter

website/source/docs/builders/amazon-ebs.html.md

@@ -343,6 +343,10 @@ builder.
     best spot price. This must be one of: `Linux/UNIX`, `SUSE Linux`, `Windows`,
     `Linux/UNIX (Amazon VPC)`, `SUSE Linux (Amazon VPC)`, `Windows (Amazon VPC)`
 
+-   `spot_tags` (object of key/value strings) - Requires `spot_price` to
+    be set. This tells Packer to aplly tags to the spot request that is
+    issued.
+
 -   `sriov_support` (boolean) - Enable enhanced networking (SriovNetSupport but not ENA)
     on HVM-compatible AMIs. If true, add `ec2:ModifyInstanceAttribute` to your AWS IAM
     policy. Note: you must make sure enhanced networking is enabled on your instance. See [Amazon's

website/source/docs/builders/amazon-ebssurrogate.html.md

@@ -336,6 +336,10 @@ builder.
     best spot price. This must be one of: `Linux/UNIX`, `SUSE Linux`, `Windows`,
     `Linux/UNIX (Amazon VPC)`, `SUSE Linux (Amazon VPC)`, `Windows (Amazon VPC)`
 
+-   `spot_tags` (object of key/value strings) - Requires `spot_price` to
+    be set. This tells Packer to aplly tags to the spot request that is
+    issued.
+
 -   `sriov_support` (boolean) - Enable enhanced networking (SriovNetSupport but not ENA)
     on HVM-compatible AMIs. If true, add `ec2:ModifyInstanceAttribute` to your AWS IAM
     policy. Note: you must make sure enhanced networking is enabled on your instance. See [Amazon's

website/source/docs/builders/amazon-ebsvolume.html.md

@@ -264,6 +264,10 @@ builder.
     best spot price. This must be one of: `Linux/UNIX`, `SUSE Linux`, `Windows`,
     `Linux/UNIX (Amazon VPC)`, `SUSE Linux (Amazon VPC)` or `Windows (Amazon VPC)`
 
+-   `spot_tags` (object of key/value strings) - Requires `spot_price` to
+    be set. This tells Packer to aplly tags to the spot request that is
+    issued.
+
 -   `sriov_support` (boolean) - Enable enhanced networking (SriovNetSupport but not ENA)
     on HVM-compatible AMIs. If true, add `ec2:ModifyInstanceAttribute` to your AWS IAM
     policy. Note: you must make sure enhanced networking is enabled on your instance. See [Amazon's

website/source/docs/builders/amazon-instance.html.md

@@ -339,6 +339,10 @@ builder.
     best spot price. This must be one of: `Linux/UNIX`, `SUSE Linux`, `Windows`,
     `Linux/UNIX (Amazon VPC)`, `SUSE Linux (Amazon VPC)`, `Windows (Amazon VPC)`
 
+-   `spot_tags` (object of key/value strings) - Requires `spot_price` to
+    be set. This tells Packer to aplly tags to the spot request that is
+    issued.
+
 -   `sriov_support` (boolean) - Enable enhanced networking (SriovNetSupport but not ENA)
     on HVM-compatible AMIs. If true, add `ec2:ModifyInstanceAttribute` to your AWS IAM
     policy. Note: you must make sure enhanced networking is enabled on your instance. See [Amazon's