Bump @types/express in /create/new_project/examples/btc_eth

Bumps [@types/express](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/express) from 4.17.6 to 4.17.7.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/express)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

create/new_project/examples/btc_eth/package.json

@@ -23,7 +23,7 @@
         "typescript": "^3.9.6"
     },
     "dependencies": {
-        "@types/express": "^4.17.6",
+        "@types/express": "^4.17.7",
         "axios": "^0.19.2",
         "comit-sdk": "^0.15",
         "dotenv": "^8.1.0",

create/new_project/examples/btc_eth/yarn.lock

@@ -126,10 +126,10 @@
     "@types/node" "*"
     "@types/range-parser" "*"
 
-"@types/express@^4.17.6":
-  version "4.17.6"
-  resolved "https://registry.yarnpkg.com/@types/express/-/express-4.17.6.tgz#6bce49e49570507b86ea1b07b806f04697fac45e"
-  integrity sha512-n/mr9tZI83kd4azlPG5y997C/M4DNABK9yErhFM6hKdym4kkmd9j0vtsJyjFIwfRBxtrxZtAfGZCNRIBMFLK5w==
+"@types/express@^4.17.7":
+  version "4.17.7"
+  resolved "https://registry.yarnpkg.com/@types/express/-/express-4.17.7.tgz#42045be6475636d9801369cd4418ef65cdb0dd59"
+  integrity sha512-dCOT5lcmV/uC2J9k0rPafATeeyz+99xTt54ReX11/LObZgfzJqZNcW27zGhYyX+9iSEGXGt5qLPwRSvBZcLvtQ==
   dependencies:
     "@types/body-parser" "*"
     "@types/express-serve-static-core" "*"