Replace poetry update with poetry install

`poetry update` is a command that upgrades all dependecies to their
latest compatible version. This is never what you want when just
installing dependencies. Instead, `poetry install` should be run to
install the dependency versions specified in the lock file.

This fixes the behavior of Frogbot upgrading all dependencies when
called in CI.

utils/python/utils.go

@@ -89,15 +89,15 @@ func ConfigPoetryRepo(url, username, password, configRepoName string) error {
 	if err = addRepoToPyprojectFile(filepath.Join(currentDir, pyproject), configRepoName, url); err != nil {
 		return err
 	}
-	return poetryUpdate()
+	return poetryInstall()
 }
 
-func poetryUpdate() (err error) {
-	log.Info("Running Poetry update")
-	cmd := io.NewCommand("poetry", "update", []string{})
+func poetryInstall() (err error) {
+	log.Info("Running Poetry install")
+	cmd := io.NewCommand("poetry", "install", []string{})
 	err = gofrogcmd.RunCmd(cmd)
 	if err != nil {
-		return errorutils.CheckErrorf("Poetry config command failed with: %s", err.Error())
+		return errorutils.CheckErrorf("Poetry install command failed with: %s", err.Error())
 	}
 	return
 }