build(deps): bump cloud.google.com/go/functions from 1.15.3 to 1.15.4

Bumps [cloud.google.com/go/functions](https://github.com/googleapis/google-cloud-go) from 1.15.3 to 1.15.4.
- [Release notes](https://github.com/googleapis/google-cloud-go/releases)
- [Changelog](https://github.com/googleapis/google-cloud-go/blob/main/CHANGES.md)
- [Commits](googleapis/google-cloud-go@kms/v1.15.3...kms/v1.15.4)

---
updated-dependencies:
- dependency-name: cloud.google.com/go/functions
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -3,7 +3,7 @@ module github.com/falcosecurity/falcosidekick
 go 1.20
 
 require (
-	cloud.google.com/go/functions v1.15.3
+	cloud.google.com/go/functions v1.15.4
 	cloud.google.com/go/pubsub v1.33.0
 	cloud.google.com/go/storage v1.35.1
 	github.com/Azure/azure-event-hubs-go/v3 v3.6.1

go.sum

@@ -51,8 +51,8 @@ cloud.google.com/go/compute/metadata v0.2.3/go.mod h1:VAV5nSsACxMJvgaAuX6Pk2Aawl
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
 cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
 cloud.google.com/go/firestore v1.6.1/go.mod h1:asNXNOzBdyVQmEU+ggO8UPodTkEVFW5Qx+rwHnAz+EY=
-cloud.google.com/go/functions v1.15.3 h1:5bAA0oK69rdOzSyJGkEod90R9zpok2CRPi1du0gwFtc=
-cloud.google.com/go/functions v1.15.3/go.mod h1:r/AMHwBheapkkySEhiZYLDBwVJCdlRwsm4ieJu35/Ug=
+cloud.google.com/go/functions v1.15.4 h1:ZjdiV3MyumRM6++1Ixu6N0VV9LAGlCX4AhW6Yjr1t+U=
+cloud.google.com/go/functions v1.15.4/go.mod h1:CAsTc3VlRMVvx+XqXxKqVevguqJpnVip4DdonFsX28I=
 cloud.google.com/go/iam v0.1.0/go.mod h1:vcUNEa0pEm0qRVpmWepWaFMIAI8/hjB9mO8rNCJtF6c=
 cloud.google.com/go/iam v0.1.1/go.mod h1:CKqrcnI/suGpybEHxZ7BMehL0oA4LpdyJdUlTl9jVMw=
 cloud.google.com/go/iam v0.3.0/go.mod h1:XzJPvDayI+9zsASAFO68Hk07u3z+f+JrT2xXNdp4bnY=