Merge pull request #750 from midnightntwrk/docs/update-node-0.22.3

docs: Update node versions for Preview 0.22.3

Author: nstanford5

docs/relnotes/overview.mdx

@@ -57,7 +57,8 @@ The following compatibility matrix denotes versions that have been tested to wor
 | Component | Version |
 |---------|--------|
 | Ledger | 8.0.3 |
-| Node | 0.22.2 |
+| Node (Preview) | 0.22.3 |
+| Node (Preprod) | 0.22.2 |
 | Proof Server | 8.0.3 |
 | On-chain Runtime | 3.0.0 |
 | Compact Runtime | 0.15.0 |

docs/relnotes/support-matrix.mdx

@@ -18,7 +18,8 @@ This matrix only reflects the latest tested versions. Earlier versions may still
 | **Functional Area**        | **Component**                       | **Version** | **Notes**                                   |
 |----------------------------|-------------------------------------|-------------|---------------------------------------------|
 | Network                    | Network                             | **Preprod/Preview** | Current testnet environments             |
-|                            | Node (Midnight)                     | 0.22.2      | Midnight testnet node                       |
+|                            | Node (Midnight)                     | 0.22.3      | Preview                                     |
+|                            | Node (Midnight)                     | 0.22.2      | Preprod                                     |
 | Runtime & Contracts        | Compact Toolchain (`compact`)       | 0.5.0       | Installs compilers, compiles contracts      |
 |                            | Compact Compiler (`compactc`)       | 0.30.0      | Contract compiler for Midnight              |
 |                            | Compact Runtime                     | 0.15.0      | Runtime library for contracts               |