Added post for grid miner launch on Steam

source/_posts/blog/grid-miner-launch.md

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+---
+title: Grid Miner has launched!
+content_type: post
+description: Grid Miner is available for purchase on Steam.
+author: James Peret
+date: 05/03/2022 10:22
+---
+Grid Miner has launched and now its available for purchase on Steam on [this page](https://store.steampowered.com/app/1768300/Grid_Miner/). It's 15% off for the next week, so hurry up and get your copy! Also don't forget to write a review if you liked the game (or disliked for some reason, all feedback is welcome).