Simplifying upgrade message format

- Remove 'to' particle from update messages
- Adjusted spacing in version comparison output
- Update tests to match the spacing

Before:
▲  astro can be updated to v1.0.0 → v2.0.0

After:
▲  astro can be updated  v1.0.0 → v2.0.0

packages/upgrade/src/actions/install.ts

@@ -48,7 +48,7 @@ export async function install(
 	const majors: PackageInfo[] = [];
 	for (const packageInfo of toInstall) {
 		const word = ctx.dryRun ? 'can' : 'will';
-		await upgrade(packageInfo, `${word} be updated to`);
+		await upgrade(packageInfo, `${word} be updated`);
 		if (packageInfo.isMajor) {
 			majors.push(packageInfo);
 		}

packages/upgrade/test/install.test.js

@@ -81,7 +81,7 @@ describe('install', () => {
 			],
 		};
 		await install(context);
-		assert.equal(fixture.hasMessage('▲  astro can be updated v1.0.0 → v2.0.0'), true);
+		assert.equal(fixture.hasMessage('▲  astro can be updated  v1.0.0 → v2.0.0'), true);
 		assert.equal(prompted, true);
 		assert.equal(exitCode, 0);
 		assert.equal(fixture.hasMessage('check   Be sure to follow the CHANGELOG.'), false);
@@ -111,7 +111,7 @@ describe('install', () => {
 			],
 		};
 		await install(context);
-		assert.equal(fixture.hasMessage('▲  astro can be updated v1.0.0 → v2.0.0'), true);
+		assert.equal(fixture.hasMessage('▲  astro can be updated  v1.0.0 → v2.0.0'), true);
 		assert.equal(prompted, true);
 		assert.equal(exitCode, undefined);
 		assert.equal(fixture.hasMessage('check   Be sure to follow the CHANGELOG.'), true);
@@ -149,8 +149,8 @@ describe('install', () => {
 			],
 		};
 		await install(context);
-		assert.equal(fixture.hasMessage('▲  a can be updated v1.0.0 → v2.0.0'), true);
-		assert.equal(fixture.hasMessage('▲  b can be updated v6.0.0 → v7.0.0'), true);
+		assert.equal(fixture.hasMessage('▲  a can be updated  v1.0.0 → v2.0.0'), true);
+		assert.equal(fixture.hasMessage('▲  b can be updated  v6.0.0 → v7.0.0'), true);
 		assert.equal(prompted, true);
 		assert.equal(exitCode, undefined);
 		const [changelog, a, b] = fixture.messages().slice(-5);
@@ -201,7 +201,7 @@ describe('install', () => {
 		assert.equal(fixture.hasMessage('◼  current is up to date on v1.0.0'), true);
 		assert.equal(fixture.hasMessage('●  patch can be updated v1.0.0 → v1.0.1'), true);
 		assert.equal(fixture.hasMessage('●  minor can be updated v1.0.0 → v1.2.0'), true);
-		assert.equal(fixture.hasMessage('▲  major can be updated v1.0.0 → v3.0.0'), true);
+		assert.equal(fixture.hasMessage('▲  major can be updated  v1.0.0 → v3.0.0'), true);
 		assert.equal(prompted, true);
 		assert.equal(exitCode, undefined);
 		assert.equal(fixture.hasMessage('check   Be sure to follow the CHANGELOG.'), true);