Updated Updating code using legacy Fluid APIs (markdown)

Updating-code-using-legacy-Fluid-APIs.md

@@ -33,15 +33,15 @@ yarn install --global @fluid-tools/build-cli@latest
 Once installed, you can rewrite the imports for a project by running `flub modify fluid-imports` and pointing it to the tsconfig.json file for your project.
 
 ```shell
-flub modify fluid-imports --tsconfig tsconfig.json
+flub modify fluid-imports --tsconfigs tsconfig.json
 ```
 
-The flag defaults to `tsconfig.json` so it coule be omitted in the example above.
+The flag defaults to `tsconfig.json` so it could be omitted in the example above.
 
 If you have multiple tsconfigs, for example a primary tsconfig and a test tsconfig, you can use the `--tsconfig` lag multiple times. For example:
 
 ```shell
-flub modify fluid-imports --tsconfig tsconfig.json --tsconfig test/tsconfig.json
+flub modify fluid-imports --tsconfigs tsconfig.json --tsconfigs test/tsconfig.json
 ```
 
 ### Monorepo usage