[chore]: Bump github.com/SherClockHolmes/webpush-go from 1.3.0 to 1.4.0 (#3694)

Bumps [github.com/SherClockHolmes/webpush-go](https://github.com/SherClockHolmes/webpush-go) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/SherClockHolmes/webpush-go/releases)
- [Commits](https://github.com/SherClockHolmes/webpush-go/compare/v1.3.0...v1.4.0)

---
updated-dependencies:
- dependency-name: github.com/SherClockHolmes/webpush-go
  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>

vendor/github.com/golang-jwt/jwt/v5/errors.go

@@ -0,0 +1,49 @@
+package jwt
+
+import (
+	"errors"
+	"strings"
+)
+
+var (
+	ErrInvalidKey                = errors.New("key is invalid")
+	ErrInvalidKeyType            = errors.New("key is of invalid type")
+	ErrHashUnavailable           = errors.New("the requested hash function is unavailable")
+	ErrTokenMalformed            = errors.New("token is malformed")
+	ErrTokenUnverifiable         = errors.New("token is unverifiable")
+	ErrTokenSignatureInvalid     = errors.New("token signature is invalid")
+	ErrTokenRequiredClaimMissing = errors.New("token is missing required claim")
+	ErrTokenInvalidAudience      = errors.New("token has invalid audience")
+	ErrTokenExpired              = errors.New("token is expired")
+	ErrTokenUsedBeforeIssued     = errors.New("token used before issued")
+	ErrTokenInvalidIssuer        = errors.New("token has invalid issuer")
+	ErrTokenInvalidSubject       = errors.New("token has invalid subject")
+	ErrTokenNotValidYet          = errors.New("token is not valid yet")
+	ErrTokenInvalidId            = errors.New("token has invalid id")
+	ErrTokenInvalidClaims        = errors.New("token has invalid claims")
+	ErrInvalidType               = errors.New("invalid type for claim")
+)
+
+// joinedError is an error type that works similar to what [errors.Join]
+// produces, with the exception that it has a nice error string; mainly its
+// error messages are concatenated using a comma, rather than a newline.
+type joinedError struct {
+	errs []error
+}
+
+func (je joinedError) Error() string {
+	msg := []string{}
+	for _, err := range je.errs {
+		msg = append(msg, err.Error())
+	}
+
+	return strings.Join(msg, ", ")
+}
+
+// joinErrors joins together multiple errors. Useful for scenarios where
+// multiple errors next to each other occur, e.g., in claims validation.
+func joinErrors(errs ...error) error {
+	return &joinedError{
+		errs: errs,
+	}
+}