docs: use make test instead of make testpkg (#5528) [skip ci]

docs/content/developers/building-contributing.md

@@ -240,11 +240,11 @@ make staticrequired
 
 ## Testing
 
-Normal test invocation is `make test`. Run a single test with an invocation like `go test -v -run TestDevAddSites ./pkg/...` or `make testpkg TESTARGS="-run TestDevAddSites"`. The easiest way to run tests is from inside the excellent golang IDE [GoLand](https://www.jetbrains.com/go/). Click the arrowhead to the left of the test name.
+Normal test invocation is `make test`. Run a single test with an invocation like `go test -v -run TestDevAddSites ./pkg/...` or `make test TESTARGS="-run TestDevAddSites"`. The easiest way to run tests is from inside the excellent golang IDE [GoLand](https://www.jetbrains.com/go/). Click the arrowhead to the left of the test name.
 
 To see which DDEV commands the tests are executing, set the environment variable `DDEV_DEBUG=true`.
 
-Use `GOTEST_SHORT=true` to run one CMS in each test, or `GOTEST_SHORT=<integer>` to run exactly one project type from the list of project types in the [TestSites array](https://github.com/ddev/ddev/blob/a4ab2827d8b6e706b2420700045d889a3a69f3f2/pkg/ddevapp/ddevapp_test.go#L43). For example, `GOTEST_SHORT=5 make testpkg TESTARGS="-run TestDdevFullSiteSetup"` will run only `TestDdevFullSiteSetup` against TYPO3.
+Use `GOTEST_SHORT=true` to run one CMS in each test, or `GOTEST_SHORT=<integer>` to run exactly one project type from the list of project types in the [TestSites array](https://github.com/ddev/ddev/blob/a4ab2827d8b6e706b2420700045d889a3a69f3f2/pkg/ddevapp/ddevapp_test.go#L43). For example, `GOTEST_SHORT=5 make test TESTARGS="-run TestDdevFullSiteSetup"` will run only `TestDdevFullSiteSetup` against TYPO3.
 
 To run a test (in the `cmd` package) against a individually-compiled DDEV binary, set the `DDEV_BINARY_FULLPATH` environment variable, for example `DDEV_BINARY_FULLPATH=$PWD/.gotmp/bin/linux_amd64/ddev make testcmd`.