bpftrace: Source from "bpftrace" instead of "iovisor"

The bpftrace repository moved to its own GitHub organisation earlier in
the year. The old iovisor links redirect to the new org, so nothing was
broken - this change is just cosmetic.

pkgs/by-name/bp/bpftrace/package.nix

@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   version = "0.21.2";
 
   src = fetchFromGitHub {
-    owner = "iovisor";
+    owner = "bpftrace";
     repo  = "bpftrace";
     rev   = "v${version}";
     hash  = "sha256-/2m+5iFE7R+ZEc/VcgWAhkLD/jEK88roUUOUyYODi0U=";
@@ -35,8 +35,8 @@ stdenv.mkDerivation rec {
 
   # tests aren't built, due to gtest shenanigans. see:
   #
-  #     https://github.com/iovisor/bpftrace/issues/161#issuecomment-453606728
-  #     https://github.com/iovisor/bpftrace/pull/363
+  #     https://github.com/bpftrace/bpftrace/issues/161#issuecomment-453606728
+  #     https://github.com/bpftrace/bpftrace/pull/363
   #
   cmakeFlags = [
     "-DBUILD_TESTING=FALSE"
@@ -76,8 +76,8 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "High-level tracing language for Linux eBPF";
-    homepage    = "https://github.com/iovisor/bpftrace";
-    changelog   = "https://github.com/iovisor/bpftrace/releases/tag/v${version}";
+    homepage    = "https://github.com/bpftrace/bpftrace";
+    changelog   = "https://github.com/bpftrace/bpftrace/releases/tag/v${version}";
     mainProgram = "bpftrace";
     license     = licenses.asl20;
     maintainers = with maintainers; [ rvl thoughtpolice martinetd mfrw ];