fix(deps): update dependency pg to v8.9.0

Signed-off-by: Renovate Bot <bot@renovateapp.com>

backend/package.json

@@ -67,7 +67,7 @@
     "passport-custom": "1.1.1",
     "passport-http-bearer": "1.0.1",
     "passport-local": "1.0.0",
-    "pg": "8.8.0",
+    "pg": "8.9.0",
     "raw-body": "2.5.1",
     "reflect-metadata": "0.1.13",
     "rimraf": "4.1.2",

yarn.lock

@@ -2262,7 +2262,7 @@ __metadata:
     passport-custom: 1.1.1
     passport-http-bearer: 1.0.1
     passport-local: 1.0.0
-    pg: 8.8.0
+    pg: 8.9.0
     prettier: 2.8.3
     raw-body: 2.5.1
     reflect-metadata: 0.1.13
@@ -14158,7 +14158,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"pg-protocol@npm:*, pg-protocol@npm:^1.5.0":
+"pg-protocol@npm:*, pg-protocol@npm:^1.6.0":
   version: 1.6.0
   resolution: "pg-protocol@npm:1.6.0"
   checksum: e12662d2de2011e0c3a03f6a09f435beb1025acdc860f181f18a600a5495dc38a69d753bbde1ace279c8c442536af9c1a7c11e1d0fe3fad3aa1348b28d9d2683
@@ -14178,15 +14178,15 @@ __metadata:
   languageName: node
   linkType: hard
 
-"pg@npm:8.8.0":
-  version: 8.8.0
-  resolution: "pg@npm:8.8.0"
+"pg@npm:8.9.0":
+  version: 8.9.0
+  resolution: "pg@npm:8.9.0"
   dependencies:
     buffer-writer: 2.0.0
     packet-reader: 1.0.0
     pg-connection-string: ^2.5.0
     pg-pool: ^3.5.2
-    pg-protocol: ^1.5.0
+    pg-protocol: ^1.6.0
     pg-types: ^2.1.0
     pgpass: 1.x
   peerDependencies:
@@ -14194,7 +14194,7 @@ __metadata:
   peerDependenciesMeta:
     pg-native:
       optional: true
-  checksum: fa30a85814dd7238b582c3bc6c0b9e2b0ae38dd0a6bb485ef480e64bb5ce589de6cb873ce4d3cd10c37a3e0a1e1281ba75dc7d80b1a68bae91999cd5b70d398b
+  checksum: dfd158955318f9ffb9428eaada29f3ee98b9eb07e87ed4b56589a19984d109f23bb8f88db78b7d7f870553e5b75ca0d58d0ed55755a8c6aed5df44e038c1d529
   languageName: node
   linkType: hard