Update Platinum Tier (#741)

5x jump in price from Gold to Platinum is a bit too high. Most of known large deployments target 200-300 hosts. Let's accommodate such users by lowering Platinum tier.

docs/blog/posts/2023-02-11-changing-tart-license.md

@@ -62,7 +62,7 @@ and before reaching the 100 CPU cores limit is royalty-free and does not have th
 
 When an organization surpasses the 100 CPU cores limit, they will be required to obtain a [Gold Tier License](/licensing#license-tiers),
 which costs \$1000 per month. Upon reaching a limit of 500 CPU cores, a [Platinum Tier License](/licensing#license-tiers)
-(\$5000 per month) will be required, and for organizations that exceed 5000 CPU cores, a custom [Diamond Tier License](/licensing#license-tiers)
+(\$3000 per month) will be required, and for organizations that exceed 3000 CPU cores, a custom [Diamond Tier License](/licensing#license-tiers)
 (\$1 per core per month) will be necessary. **All paid license tiers will include priority feature development and SLAs on support with urgent issues.**
 
 ## Have we considered alternatives?

docs/licensing.md

@@ -40,9 +40,9 @@ Gold Tier license has a 500 CPU core limit for Tart and 20 Orchard Workers limit
 
 ### Platinum Tier
 
-If an organization wishes to exceed the limits of the Gold Tier license, a purchase of the [Platinum Tier License](#get-the-license) is required, which costs \$5000 per month.
+If an organization wishes to exceed the limits of the Gold Tier license, a purchase of the [Platinum Tier License](#get-the-license) is required, which costs \$3000 per month.
 
-Platinum Tier license has a 5,000 CPU core limit for Tart and 200 Orchard Workers limit for Orchard.
+Platinum Tier license has a 3,000 CPU core limit for Tart and 200 Orchard Workers limit for Orchard.
 
 ### Diamond Tier