fix(deps): update dependency node-fetch to v2.7.0

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

backend/package.json

@@ -62,7 +62,7 @@
     "markdown-it": "13.0.1",
     "minio": "7.1.1",
     "mysql": "2.18.1",
-    "node-fetch": "2.6.13",
+    "node-fetch": "2.7.0",
     "passport": "0.6.0",
     "passport-custom": "1.1.1",
     "passport-http-bearer": "1.0.1",

yarn.lock

@@ -2331,7 +2331,7 @@ __metadata:
     minio: 7.1.1
     mocked-env: 1.3.5
     mysql: 2.18.1
-    node-fetch: 2.6.13
+    node-fetch: 2.7.0
     passport: 0.6.0
     passport-custom: 1.1.1
     passport-http-bearer: 1.0.1
@@ -13883,7 +13883,21 @@ __metadata:
   languageName: node
   linkType: hard
 
-"node-fetch@npm:2.6.13, node-fetch@npm:^2.6.1, node-fetch@npm:^2.6.7":
+"node-fetch@npm:2.7.0":
+  version: 2.7.0
+  resolution: "node-fetch@npm:2.7.0"
+  dependencies:
+    whatwg-url: ^5.0.0
+  peerDependencies:
+    encoding: ^0.1.0
+  peerDependenciesMeta:
+    encoding:
+      optional: true
+  checksum: d76d2f5edb451a3f05b15115ec89fc6be39de37c6089f1b6368df03b91e1633fd379a7e01b7ab05089a25034b2023d959b47e59759cb38d88341b2459e89d6e5
+  languageName: node
+  linkType: hard
+
+"node-fetch@npm:^2.6.1, node-fetch@npm:^2.6.7":
   version: 2.6.13
   resolution: "node-fetch@npm:2.6.13"
   dependencies: