Bump nsa from git to 0.2.8 (#16033)

Gemfile.lock

@@ -1,14 +1,3 @@
-GIT
-  remote: https://github.com/Gargron/nsa
-  revision: d1079e0cdafdfed7f9f35478d13b9bdaa65965c0
-  ref: d1079e0cdafdfed7f9f35478d13b9bdaa65965c0
-  specs:
-    nsa (0.2.8)
-      activesupport (>= 4.2, < 7)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-      sidekiq (>= 3.5)
-      statsd-ruby (~> 1.4, >= 1.4.0)
-
 GEM
   remote: https://rubygems.org/
   specs:
@@ -384,6 +373,11 @@ GEM
       racc (~> 1.4)
     nokogumbo (2.0.4)
       nokogiri (~> 1.8, >= 1.8.4)
+    nsa (0.2.8)
+      activesupport (>= 4.2, < 7)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      sidekiq (>= 3.5)
+      statsd-ruby (~> 1.4, >= 1.4.0)
     oj (3.11.3)
     omniauth (1.9.1)
       hashie (>= 3.4.6)
@@ -747,7 +741,7 @@ DEPENDENCIES
   mime-types (~> 3.3.1)
   net-ldap (~> 0.17)
   nokogiri (~> 1.11)
-  nsa!
+  nsa (~> 0.2)
   oj (~> 3.11)
   omniauth (~> 1.9)
   omniauth-cas (~> 2.0)