Bump go.opencensus.io in /processor/groupbytraceprocessor (#1320)

Bumps [go.opencensus.io](https://github.com/census-instrumentation/opencensus-go) from 0.22.4 to 0.22.5.
- [Release notes](https://github.com/census-instrumentation/opencensus-go/releases)
- [Commits](census-instrumentation/opencensus-go@v0.22.4...v0.22.5)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

processor/groupbytraceprocessor/go.mod

@@ -4,7 +4,7 @@ go 1.14
 
 require (
 	github.com/stretchr/testify v1.6.1
-	go.opencensus.io v0.22.4
+	go.opencensus.io v0.22.5
 	go.opentelemetry.io/collector v0.13.0
 	go.uber.org/zap v1.16.0
 )

processor/groupbytraceprocessor/go.sum

@@ -1008,6 +1008,8 @@ go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.4 h1:LYy1Hy3MJdrCdMwwzxA/dRok4ejH+RwNGbuoD9fCjto=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
+go.opencensus.io v0.22.5 h1:dntmOdLpSpHlVqbW5Eay97DelsZHe+55D+xC6i0dDS0=
+go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk=
 go.opentelemetry.io/collector v0.13.0 h1:w5DywMfxHIoGhomH382SJn95+TGQDTz5r9n4bBACe4Y=
 go.opentelemetry.io/collector v0.13.0/go.mod h1:UB7wWD7RrEx8GFSaUR47TO1GAqxSi5+Kq68tI1icwJk=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=