Bump version of go4.org/unsafe/assume-no-moving-gc for GO 1.18

[L3n41c]

What does this PR do?

Bump the version of the go4.org/unsafe/assume-no-moving-gc dependency in order to get this patch: go4org/unsafe-assume-no-moving-gc#4.

Motivation

If the agent is currently built with GO 1.18, it panics at startup with this error:

panic: Something in this program imports go4.org/unsafe/assume-no-moving-gc to declare that it assumes a non-moving garbage collector, but your version of go4.org/unsafe/assume-no-moving-gc hasn't been updated to assert that it's safe against the go1.18 runtime. If you want to risk it, run with environment variable ASSUME_NO_MOVING_GC_UNSAFE_RISK_IT_WITH=go1.18 set. Notably, if go1.18 adds a moving garbage collector, this program is unsafe to use.

goroutine 1 [running]:
go4.org/unsafe/assume-no-moving-gc.init.0()
	/home/lenaic/go/pkg/mod/go4.org/unsafe/assume-no-moving-gc@v0.0.0-20201222175341-b30ae309168e/untested.go:24 +0x3a5

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