Bump @ngx-formly/core from 5.10.20 to 5.12.7 in /frontend

Bumps [@ngx-formly/core](https://github.com/ngx-formly/ngx-formly) from 5.10.20 to 5.12.7.
- [Release notes](https://github.com/ngx-formly/ngx-formly/releases)
- [Changelog](https://github.com/ngx-formly/ngx-formly/blob/main/CHANGELOG.md)
- [Commits](https://github.com/ngx-formly/ngx-formly/compare/v5.10.20...v5.12.7)

---
updated-dependencies:
- dependency-name: "@ngx-formly/core"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

frontend/package-lock.json

@@ -5608,9 +5608,9 @@
       }
     },
     "node_modules/@ngx-formly/core": {
-      "version": "5.10.20",
-      "resolved": "https://registry.npmjs.org/@ngx-formly/core/-/core-5.10.20.tgz",
-      "integrity": "sha512-TwZfyRBnqd9JqLXR90MVOoxH+6G+B0Uli65DWTwJeO/Sgxb/3zRE7nSDVaSiD4f1Et+ce6JftktiyRMcA2okNA==",
+      "version": "5.12.7",
+      "resolved": "https://registry.npmjs.org/@ngx-formly/core/-/core-5.12.7.tgz",
+      "integrity": "sha512-WE4mVbIgWJ6zVf6WdQTUjQ17th/iZTW5pYlF43JdWxhwzmY6IX/NA2Qg7N4gtdlV3+Z+iSytcocBVx8G4kukZA==",
       "dependencies": {
         "tslib": "^1.7.1"
       },
@@ -52465,9 +52465,9 @@
       "dev": true
     },
     "@ngx-formly/core": {
-      "version": "5.10.20",
-      "resolved": "https://registry.npmjs.org/@ngx-formly/core/-/core-5.10.20.tgz",
-      "integrity": "sha512-TwZfyRBnqd9JqLXR90MVOoxH+6G+B0Uli65DWTwJeO/Sgxb/3zRE7nSDVaSiD4f1Et+ce6JftktiyRMcA2okNA==",
+      "version": "5.12.7",
+      "resolved": "https://registry.npmjs.org/@ngx-formly/core/-/core-5.12.7.tgz",
+      "integrity": "sha512-WE4mVbIgWJ6zVf6WdQTUjQ17th/iZTW5pYlF43JdWxhwzmY6IX/NA2Qg7N4gtdlV3+Z+iSytcocBVx8G4kukZA==",
       "requires": {
         "tslib": "^1.7.1"
       },