chore: Switch to web-push gem (#6390)

- The previous gem, `webpush` was last updated a while ago. Also, with the recent ruby upgrade, we needed a fix for zaru/webpush#106. Hence switching to the `web-push` gem where the issues are fixed.

Gemfile.lock

@@ -1,12 +1,3 @@
-GIT
-  remote: https://github.com/ClearlyClaire/webpush.git
-  revision: f14a4d52e201128b1b00245d11b6de80d6cfdcd9
-  ref: f14a4d52e201128b1b00245d11b6de80d6cfdcd9
-  specs:
-    webpush (0.3.8)
-      hkdf (~> 0.2)
-      jwt (~> 2.0)
-
 GIT
   remote: https://github.com/chatwoot/devise-secure_password
   revision: d777b04f12652d576b1272b8f39857e3e0b3fc26
@@ -332,7 +323,7 @@ GEM
     hana (1.3.7)
     hashdiff (1.0.1)
     hashie (5.0.0)
-    hkdf (0.3.0)
+    hkdf (1.0.0)
     html2text (0.2.1)
       nokogiri (~> 1.6)
     http (5.1.0)
@@ -470,6 +461,7 @@ GEM
     omniauth-oauth2 (1.8.0)
       oauth2 (>= 1.4, < 3)
       omniauth (~> 2.0)
+    openssl (3.1.0)
     orm_adapter (0.5.0)
     os (1.1.4)
     parallel (1.22.1)
@@ -711,6 +703,10 @@ GEM
       activemodel (>= 6.0.0)
       bindex (>= 0.4.0)
       railties (>= 6.0.0)
+    web-push (3.0.0)
+      hkdf (~> 1.0)
+      jwt (~> 2.0)
+      openssl (~> 3.0)
     webmock (3.18.1)
       addressable (>= 2.8.0)
       crack (>= 0.3.2)
@@ -842,9 +838,9 @@ DEPENDENCIES
   uglifier
   valid_email2
   web-console
+  web-push
   webmock
   webpacker (~> 5.4, >= 5.4.3)
-  webpush!
   wisper (= 2.0.0)
   working_hours