chore: update the roadmap timeline

src/pages/index.mdx

@@ -291,43 +291,32 @@ import {
     alignment="top"
     timeline={[
       {
-        period: [2018, 'Q1'],
-        borderStyle: 'solid',
-        description: "Nimbus team founded",
+        period: [2018],
+        description: "Nimbus commences work on PoS client"
       },
       {
-        period: [2018, 'Q4'],
-        borderStyle: 'dashed',
-        description: 'Proof-of-stake client dev begins',
+        period: [2019],
+        description: "Nimbus participates in the first multi client testnet"
       },
       {
-        period: [2019, 'Q1'],
-        borderStyle: 'solid',
-        description: 'Nimbus launches to testnet',
-      },
-      {
-        period: [2019, 'Q3'],
-        borderStyle: 'dashed',
-        description: 'Nimbus and Lighthouse run first multi-client testnet',
-      },
-      {
-        period: [2020, 'Q4'],
-        borderStyle: 'dashed',
-        description: 'Runs 144 validators at Beacon Chain mainnet launch',
+        period: [2020],
+        description: "Runs 144 validators on mainnet at beacon chain launch"
       },
       {
         period: [2021],
-        borderStyle: 'dashed',
-        description: 'Nimbus receives first EF grant—exec client',
+        description: "Nimbus receives EF grant to develop an Execution Client"
       },
       {
         period: [2022],
-        borderStyle: 'dashed',
-        description: 'Nimbus receives second EF grant—portal client',
+        description: "Feature enhancements to Nimbus consensus client and continued work on Execution client"
       },
       {
-        period: [2023, '+'],
-        description: 'Deving one-click install, component redundancy',
+        period: [2023],
+        description: "Improved resilience and performance of Consensus client from multi-BN, multi-EL support"
+      },
+      {
+        period: [2024],
+        description: "Nimbus Execution client launch on mainnet, Introduction of the Nimbus node management UI, Distributed Validator features and improvements to the Nimbus Consensus client"
       },
     ]}
   >