Bump the all-npm-dependencies group across 3 directories with 2 updates

Bumps the all-npm-dependencies group with 1 update in the / directory: [@sap/cds-mtxs](https://cap.cloud.sap/).
Bumps the all-npm-dependencies group with 1 update in the /app directory: @sap/approuter.
Bumps the all-npm-dependencies group with 1 update in the /mtx/sidecar directory: [@sap/cds-mtxs](https://cap.cloud.sap/).


Updates `@sap/cds-mtxs` from 3.9.0 to 3.9.1

Updates `@sap/approuter` from 21.4.0 to 21.5.0

Updates `@sap/cds-mtxs` from 3.9.0 to 3.9.1

---
updated-dependencies:
- dependency-name: "@sap/cds-mtxs"
  dependency-version: 3.9.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: all-npm-dependencies
- dependency-name: "@sap/approuter"
  dependency-version: 21.5.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: all-npm-dependencies
- dependency-name: "@sap/cds-mtxs"
  dependency-version: 3.9.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: all-npm-dependencies
...

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Author: dependabot[bot]