chore: several typos from bots (#7228)

Author: nflaig

docs/README.md

@@ -22,4 +22,4 @@ This command starts a local development server and opens up a browser window. Mo
 $ yarn build
 ```
 
-This command generates static content into the `build` directory and can be served using any static contents hosting service.
+This command generates static content into the `build` directory and can be served using any static content hosting service.

types/vitest/index.d.ts

@@ -4,7 +4,7 @@ interface CustomMatchers<R = unknown> {
   toBeValidEpochCommittee(opts: {committeeCount: number; validatorsPerCommittee: number; slotsPerEpoch: number}): R;
   /**
    * @deprecated
-   * We highly recommend to not use this matcher instead use detail test case
+   * We highly recommend to not use this matcher instead use detailed test case
    * where you don't need message to explain assertion
    *
    * @example
@@ -27,7 +27,7 @@ interface CustomMatchers<R = unknown> {
   toBeWithMessage(expected: unknown, message: string): R;
   /**
    * @deprecated
-   * We highly recommend to not use this matcher instead use detail test case with .toEqual
+   * We highly recommend to not use this matcher instead use detailed test case with .toEqual
    * where you don't need message to explain assertion
    * */
   toEqualWithMessage(expected: unknown, message: string): R;