inlet/flow: fix fork of Goflow2

```
benchmark                                            old ns/op     new ns/op     delta
BenchmarkDecodeEncodeNetflow/with_encoding-12        7664          7548          -1.51%
BenchmarkDecodeEncodeNetflow/without_encoding-12     7273          6872          -5.51%
BenchmarkDecodeEncodeSflow/with_encoding-12          14029         9905          -29.40%
BenchmarkDecodeEncodeSflow/without_encoding-12       13784         9245          -32.93%

benchmark                                            old allocs     new allocs     delta
BenchmarkDecodeEncodeNetflow/with_encoding-12        143            134            -6.29%
BenchmarkDecodeEncodeNetflow/without_encoding-12     143            134            -6.29%
BenchmarkDecodeEncodeSflow/with_encoding-12          295            137            -53.56%
BenchmarkDecodeEncodeSflow/without_encoding-12       295            137            -53.56%

benchmark                                            old bytes     new bytes     delta
BenchmarkDecodeEncodeNetflow/with_encoding-12        8272          8160          -1.35%
BenchmarkDecodeEncodeNetflow/without_encoding-12     8272          8160          -1.35%
BenchmarkDecodeEncodeSflow/with_encoding-12          9816          8216          -16.30%
BenchmarkDecodeEncodeSflow/without_encoding-12       9816          8216          -16.30%
```

"old" is still before using the fork. See
netsampler/goflow2#141 for details of the fix.

go.mod

@@ -138,5 +138,5 @@ require (
 replace (
 	github.com/benbjohnson/clock => github.com/vincentbernat/go-clock v0.0.0-20220922224448-739bd11b5833
 	github.com/kentik/patricia => github.com/vincentbernat/patricia v0.0.0-20220923091046-b376a1167a94
-	github.com/netsampler/goflow2 => github.com/vincentbernat/goflow2 v1.0.5-0.20230119075524-e65432c88a7d
+	github.com/netsampler/goflow2 => github.com/vincentbernat/goflow2 v1.0.5-0.20230119111129-c797534c51e4
 )

go.sum

@@ -485,8 +485,8 @@ github.com/ugorji/go/codec v1.2.7/go.mod h1:WGN1fab3R1fzQlVQTkfxVtIBhWDRqOviHU95
 github.com/urfave/cli/v2 v2.1.1/go.mod h1:SE9GqnLQmjVa0iPEY0f1w3ygNIYcIJ0OKPMoW2caLfQ=
 github.com/vincentbernat/go-clock v0.0.0-20220922224448-739bd11b5833 h1:eeHgOFlrGNESR9TF+AJovNWOxH8AdmXWK2nGXKa6RUU=
 github.com/vincentbernat/go-clock v0.0.0-20220922224448-739bd11b5833/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
-github.com/vincentbernat/goflow2 v1.0.5-0.20230119075524-e65432c88a7d h1:U2XyWb7KrphSXqF1wzU0mVyY6W7NXLV8/LRNR/SjEjg=
-github.com/vincentbernat/goflow2 v1.0.5-0.20230119075524-e65432c88a7d/go.mod h1:oNIeGj67SjwrRSTEukErjNT1zZ02W9+8M5mSgQCkZC8=
+github.com/vincentbernat/goflow2 v1.0.5-0.20230119111129-c797534c51e4 h1:peywq/qLmgBq11JZgus3XqnOf8NqDnSQ7ygi+X0O6w8=
+github.com/vincentbernat/goflow2 v1.0.5-0.20230119111129-c797534c51e4/go.mod h1:oNIeGj67SjwrRSTEukErjNT1zZ02W9+8M5mSgQCkZC8=
 github.com/vincentbernat/patricia v0.0.0-20220923091046-b376a1167a94 h1:T7+yyM6300NYIv1kqlXX53d2cjEHpgDt6cFbBYO+upk=
 github.com/vincentbernat/patricia v0.0.0-20220923091046-b376a1167a94/go.mod h1:6jY40ESetsbfi04/S12iJlsiS6DYL2B2W+WAcqoDHtw=
 github.com/vishvananda/netns v0.0.0-20180720170159-13995c7128cc/go.mod h1:ZjcWmFBXmLKZu9Nxj3WKYEafiSqer2rnvPr0en9UNpI=