dependabot: bump bstr from 1.6.0 to 1.6.2 #686

Job	Run time
build release channel stable	1m 45s
build 1.66.0 on ubuntu-latest	3m 57s
build release channel beta	1m 46s
build 1.67.1 on ubuntu-latest	4m 21s
build 1.68.0 on ubuntu-latest	3m 52s
build 1.70.0 on ubuntu-latest	3m 38s
build 1.66.0 on macos-latest	6m 34s
build 1.67.1 on macos-latest	5m 31s
build 1.68.0 on macos-latest	6m 35s
build 1.70.0 on macos-latest	7m 12s
build 1.66.0 on windows-latest	7m 2s
build 1.67.1 on windows-latest	6m 1s
build 1.68.0 on windows-latest	6m 15s
build 1.70.0 on windows-latest	5m 48s
check	2m 52s
bench	4m 1s
build debug and release, upload	3m 56s
clippy	1m 45s
codecov validate	5s
doc, publish	2m 21s
test	10m 13s
yamllint	11s
run s4	4m 24s
llvm-cov	10m 54s
	1h 50m 59s

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