Update validator stake button APPS-978 (#12560)

## Description 

[APPS-978](https://mysten.atlassian.net/browse/APPS-978?atlOrigin=eyJpIjoiZDY1ZGEyYTQ3ZGFjNGYzMzgyOTA4YzUyNmM1YjlkZDIiLCJwIjoiaiJ9)
Describe the changes or additions included in this PR.

<img width="453" alt="Screenshot 2023-06-18 at 3 28 29 PM"
src="https://github.com/MystenLabs/sui/assets/126525197/18c96f26-9eb6-4d46-a08b-b3ba61b9d347">
<img width="492" alt="Screenshot 2023-06-18 at 3 28 34 PM"
src="https://github.com/MystenLabs/sui/assets/126525197/1ff66976-358d-4242-9170-b34b6003b69a">

apps/explorer/src/components/validator/StakeButton.tsx

@@ -46,7 +46,6 @@ export function StakeButton() {
 		return (
 			<Button
 				size="lg"
-				variant="outline"
 				href="https://chrome.google.com/webstore/detail/sui-wallet/opcgpfmipidbgpenhmajoajpbobppdil"
 			>
 				Install Sui Wallet to stake SUI
@@ -67,7 +66,6 @@ export function StakeButton() {
 		return (
 			<Button
 				size="lg"
-				variant="outline"
 				onClick={() => {
 					// Always just assume we should connect to the first stake supported wallet for now:
 					connect(stakeSupportedWallets[0].name);

apps/explorer/src/components/validator/ValidatorMeta.tsx

@@ -39,7 +39,7 @@ export function ValidatorMeta({ validatorData }: ValidatorMetaProps) {
 							rel="noreferrer noopener"
 							className="mt-2.5 inline-flex items-center gap-1.5 text-body font-medium text-sui-dark no-underline"
 						>
-							{projectUrl}
+							{projectUrl.replace(/\/$/, '')}
 							<ArrowUpRight12 className="text-steel" />
 						</a>
 					)}