Docs: Use gems config key for Jekyll < 3.5.0

[first-timers]

🆕🐥☝ First Timers Only.

This issue is reserved for people who never contributed to Open Source before. We know that the process of creating a pull request is the biggest barrier for new contributors. This issue is for you 💝

About First Timers Only.

🎃💻👕 Hacktoberfest: Trick or Treat!

If you haven’t yet, sign up for Hacktoberfest to earn an exclusive T-Shirt. Plus I’m sure we can teach you a cool trick or two in the process

🤔 What you will need to know.

Nothing. This issue is meant to welcome you to Open Source :) We are happy to walk you through the process.

📋 Step by Step

• 🙋 Claim this issue: Comment below.

  Once claimed we add you as contributor to this repository.

• 👌 Accept our invitation to this repository. Once accepted, assign yourself to this issue

• 📝 Update the file docs/installation.md in the jekyll-seo-tag repository (press the little pen Icon) and edit the line as shown below.

@@ -13,6 +13,8 @@
     - jekyll-seo-tag
 
:bulb: If you are using a Jekyll version less than `3.5.0`, use the `gems` key instead of `plugins`.

• 💾 Commit your changes

• 🔀 Start a Pull Request. There are two ways how you can start a pull request:

1. If you are familiar with the terminal or would like to learn it, here is a great tutorial on how to send a pull request using the terminal.

2. You can edit files directly in your browser

• 🏁 Done Ask in comments for a review :)

🤔❓ Questions

Leave a comment below!

This issue was created by First-Timers-Bot.

[seafr]

Hi, I'd like to claim this issue. Thank you.

[DirtyF]

@seafr 👍

Make sure to add backticks to the keys:

💡 If you are using a Jekyll version less than 3.5.0, use the `gems` key instead of `plugins`.

[seafr]

I did. And for the version number too. So far, it looks ok. Please see https://github.com/seafr/jekyll-seo-tag/blob/first-timers-label/docs/installation.md

[DirtyF]

Add the 💡, open a pull request, and we're good 👌

[seafr]

Done. Thank you.