build(deps): bump github.com/alitto/pond from 1.5.1 to 1.7.1

Bumps [github.com/alitto/pond](https://github.com/alitto/pond) from 1.5.1 to 1.7.1.
- [Release notes](https://github.com/alitto/pond/releases)
- [Commits](alitto/pond@v1.5.1...v1.7.1)

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

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

go.mod

@@ -3,7 +3,7 @@ module github.com/estahn/k8s-image-swapper
 go 1.16
 
 require (
-	github.com/alitto/pond v1.5.1
+	github.com/alitto/pond v1.7.1
 	github.com/aws/aws-sdk-go v1.40.56
 	github.com/bits-and-blooms/bitset v1.2.1 // indirect
 	github.com/cespare/xxhash/v2 v2.1.2 // indirect

go.sum

@@ -121,8 +121,8 @@ github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRF
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
 github.com/alexflint/go-filemutex v0.0.0-20171022225611-72bdc8eae2ae/go.mod h1:CgnQgUtFrFz9mxFNtED3jI5tLDjKlOM+oUF/sTk6ps0=
-github.com/alitto/pond v1.5.1 h1:HwOA8M/QB8lpkqzj8lnCEvC+44lHbPrrD5qHaJ9HRYI=
-github.com/alitto/pond v1.5.1/go.mod h1:LPLCPu5q4FAhvZsJB9OsNcXE+pUMu7lwf7fzPZH0HPs=
+github.com/alitto/pond v1.7.1 h1:HFXCRmJxDD031ZgwB7KfWItaePzJR9OlkLLjOo82JXo=
+github.com/alitto/pond v1.7.1/go.mod h1:/TYBaKCXvQ8Qiy3TfOoKeu6K7AVAhMpvu4itSpGdws0=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/apache/thrift v0.13.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=