Merge pull request #4633 from haytok/fix-nerdctl-namespace-docs

docs/command-reference.md: fix nerdctl namespace anchors without blue…

Author: AkihiroSuda

docs/command-reference.md

@@ -79,11 +79,11 @@
   - [:whale: nerdctl volume rm](#whale-nerdctl-volume-rm)
   - [:whale: nerdctl volume prune](#whale-nerdctl-volume-prune)
 - [Namespace management](#namespace-management)
-  - [:nerd_face: nerdctl namespace create](#nerd_face-blue_square-nerdctl-namespace-create)
-  - [:nerd_face: nerdctl namespace inspect](#nerd_face-blue_square-nerdctl-namespace-inspect)
-  - [:nerd_face: nerdctl namespace ls](#nerd_face-blue_square-nerdctl-namespace-ls)
-  - [:nerd_face: nerdctl namespace remove](#nerd_face-blue_square-nerdctl-namespace-remove)
-  - [:nerd_face: nerdctl namespace update](#nerd_face-blue_square-nerdctl-namespace-update)
+  - [:nerd_face: nerdctl namespace create](#nerd_face-nerdctl-namespace-create)
+  - [:nerd_face: nerdctl namespace inspect](#nerd_face-nerdctl-namespace-inspect)
+  - [:nerd_face: nerdctl namespace ls](#nerd_face-nerdctl-namespace-ls)
+  - [:nerd_face: nerdctl namespace remove](#nerd_face-nerdctl-namespace-remove)
+  - [:nerd_face: nerdctl namespace update](#nerd_face-nerdctl-namespace-update)
 - [AppArmor profile management](#apparmor-profile-management)
   - [:nerd_face: nerdctl apparmor inspect](#nerd_face-nerdctl-apparmor-inspect)
   - [:nerd_face: nerdctl apparmor load](#nerd_face-nerdctl-apparmor-load)