frameworks_and_external_apis.md: reword
frameworks_and_external_apis.md: reword

JetBrains/intellij-sdk-docs,artspb/intellij-sdk-docs,chashnikov/intellij-sdk-docs,chashnikov/intellij-sdk-docs,chashnikov/intellij-sdk-docs,artspb/intellij-sdk-docs,JetBrains/intellij-sdk-docs,artspb/intellij-sdk-docs,JetBrains/intellij-sdk-docs,chashnikov/intellij-sdk-docs,artspb/intellij-sdk-docs