[spp] SPP documentation update on dpdk.org

[Yasufumi Ogawa]

>>>>> Last but not the least, the doc will be generated only when you push an annotated tag:
>>>>> 	git tag -am spp-18.08 v18.08
>>>> I understand pushing tag is also incorrect. I simply added the tag and pushed.
>>>>      $ git tag v18.08
>>>>      $ git push origin v18.08
>>>
>>> This does not trigger compilation of the doc.
>>> You must use *annotated* tags.
>> Hi Thomas,
>>
>> I tried to add annotated tag for v18.08.1 and push to the repository after applied your patch. However, it does not seem to be
>> working. I confirmed the version number is defined in GNUmakefile as 'VERSION := 18.08.1', and added annotated tag. Here is a
>> result of 'git show' in which annotation is found. Could you give me advice?
> 
> It is a bug in the script stripping the minor version number.
> I fixed it and ran the script again.
Thank you so much for fixing quickly!

Yasufumi