Removing extra double-quote at the end of a comment in VkFormatFeatureFlagBits2 (#2680)

This was confusing some tokenizing code, where it started parsing double-quoted strings after the end of the "bitpos 13..." comment, generally messing up the parsing of the whole file after that.

Author: osor-io

xml/vk.xml

@@ -13360,7 +13360,7 @@ typedef void* <name>MTLSharedEvent_id</name>;
         <enum bitpos="10"   name="VK_FORMAT_FEATURE_2_BLIT_SRC_BIT"/>
         <enum bitpos="11"   name="VK_FORMAT_FEATURE_2_BLIT_DST_BIT"/>
         <enum bitpos="12"   name="VK_FORMAT_FEATURE_2_SAMPLED_IMAGE_FILTER_LINEAR_BIT"/>
-            <comment>bitpos 13 is an extension interaction with VK_EXT_filter_cubic"</comment>
+            <comment>bitpos 13 is an extension interaction with VK_EXT_filter_cubic</comment>
         <enum bitpos="14"   name="VK_FORMAT_FEATURE_2_TRANSFER_SRC_BIT"/>
         <enum bitpos="15"   name="VK_FORMAT_FEATURE_2_TRANSFER_DST_BIT"/>
         <enum bitpos="16"   name="VK_FORMAT_FEATURE_2_SAMPLED_IMAGE_FILTER_MINMAX_BIT"/>