chore(deps): bump github.com/russellhaering/goxmldsig in /backend

Bumps [github.com/russellhaering/goxmldsig](https://github.com/russellhaering/goxmldsig) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/russellhaering/goxmldsig/releases)
- [Commits](russellhaering/goxmldsig@v1.3.0...v1.4.0)

---
updated-dependencies:
- dependency-name: github.com/russellhaering/goxmldsig
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

backend/go.mod

@@ -31,7 +31,7 @@ require (
 	github.com/pkg/errors v0.9.1
 	github.com/rs/zerolog v1.31.0
 	github.com/russellhaering/gosaml2 v0.9.1
-	github.com/russellhaering/goxmldsig v1.3.0
+	github.com/russellhaering/goxmldsig v1.4.0
 	github.com/sethvargo/go-limiter v0.7.2
 	github.com/sethvargo/go-redisstore v0.3.0
 	github.com/spf13/cobra v1.7.0

backend/go.sum

@@ -557,8 +557,9 @@ github.com/rs/zerolog v1.31.0 h1:FcTR3NnLWW+NnTwwhFWiJSZr4ECLpqCm6QsEnyvbV4A=
 github.com/rs/zerolog v1.31.0/go.mod h1:/7mN4D5sKwJLZQ2b/znpjC3/GQWY/xaDXUM0kKWRHss=
 github.com/russellhaering/gosaml2 v0.9.1 h1:H/whrl8NuSoxyW46Ww5lKPskm+5K+qYLw9afqJ/Zef0=
 github.com/russellhaering/gosaml2 v0.9.1/go.mod h1:ja+qgbayxm+0mxBRLMSUuX3COqy+sb0RRhIGun/W2kc=
-github.com/russellhaering/goxmldsig v1.3.0 h1:DllIWUgMy0cRUMfGiASiYEa35nsieyD3cigIwLonTPM=
 github.com/russellhaering/goxmldsig v1.3.0/go.mod h1:gM4MDENBQf7M+V824SGfyIUVFWydB7n0KkEubVJl+Tw=
+github.com/russellhaering/goxmldsig v1.4.0 h1:8UcDh/xGyQiyrW+Fq5t8f+l2DLB1+zlhYzkPUJ7Qhys=
+github.com/russellhaering/goxmldsig v1.4.0/go.mod h1:gM4MDENBQf7M+V824SGfyIUVFWydB7n0KkEubVJl+Tw=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=