chore: bump go version to latest

Signed-off-by: Andrea Terzolo <andrea.terzolo@suse.com>

Author: Andreagit97

go.mod

@@ -1,8 +1,8 @@
 module github.com/StackVista/stackstate-process-agent
 
-go 1.25.0
+go 1.26.0
 
-toolchain go1.25.9
+toolchain go1.26.2
 
 // From datadog-agent-upstream-for-process-agent, replaces done in that go mod file need to be done here too
 replace github.com/pahanini/go-grpc-bidirectional-streaming-example v0.0.0-20211027164128-cc6111af44be => github.com/DataDog/go-grpc-bidirectional-streaming-example v0.0.0-20221024060302-b9cf785c02fe