properly print instructions when the api reports don't match

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

.changeset/five-turkeys-taste.md

@@ -0,0 +1,5 @@
+---
+'@backstage/repo-tools': patch
+---
+
+Properly log instructions when APIs do not match

packages/repo-tools/src/commands/api-reports/api-extractor.ts

@@ -519,14 +519,17 @@ export async function runApiExtraction({
           if (message.text.includes('The API report file is missing')) {
             shouldLogInstructions = true;
           }
+
+          // Detect messages like the following being output by the generator:
+          // Warning: You have changed the API signature for this project. Please copy the file "/home/runner/work/backstage/backstage/node_modules/.cache/api-extractor/backend-test-utils/report.api.md" to "report.api.md", or perform a local build (which does this automatically). See the Git repo documentation for more info.
           if (
             message.text.includes(
-              'You have changed the public API signature for this project.',
+              'You have changed the API signature for this project.',
             )
           ) {
             shouldLogInstructions = true;
             const match = message.text.match(
-              /Please copy the file "(.*)" to "api-report\.api\.md"/,
+              /Please copy the file "(.*)" to "report\.api\.md"/,
             );
             if (match) {
               conflictingFile = match[1];