chore: change "already bootstrapped" message (#1180)

Change the wording of the "already bootstrapped" message to be more emotionally neutral.

Author: rix0rrr

Diff for: packages/aws-cdk/bin/cdk.ts

@@ -281,8 +281,8 @@ async function initCommandLine() {
       success(' ⏳  Bootstrapping environment %s...', colors.blue(environment.name));
       try {
         const result = await bootstrapEnvironment(environment, aws, toolkitStackName, roleArn);
-        const message = result.noOp ? ' ✅  Environment %s was already fully bootstrapped!'
-                      : ' ✅  Successfully bootstrapped environment %s!';
+        const message = result.noOp ? ' ✅  Environment %s bootstrapped (no changes).'
+                      : ' ✅  Environment %s bootstrapped.';
         success(message, colors.blue(environment.name));
       } catch (e) {
         error(' ❌  Environment %s failed bootstrapping: %s', colors.blue(environment.name), e);