Bump middleman from 4.4.3 to 4.5.0

Bumps [middleman](https://github.com/middleman/middleman) from 4.4.3 to 4.5.0.
- [Release notes](https://github.com/middleman/middleman/releases)
- [Changelog](https://github.com/middleman/middleman/blob/main/CHANGELOG.md)
- [Commits](https://github.com/middleman/middleman/commits/v4.5.0)

---
updated-dependencies:
- dependency-name: middleman
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -24,8 +24,9 @@ GEM
     fast_blank (1.0.1)
     fastimage (2.3.0)
     ffi (1.16.3)
-    haml (5.2.2)
-      temple (>= 0.8.0)
+    haml (6.3.0)
+      temple (>= 0.8.2)
+      thor
       tilt
     hamster (3.0.0)
       concurrent-ruby (~> 1.0)
@@ -38,18 +39,18 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     memoist (0.16.2)
-    middleman (4.4.3)
+    middleman (4.5.0)
       coffee-script (~> 2.2)
-      haml (>= 4.0.5, < 6.0)
+      haml (>= 4.0.5)
       kramdown (>= 2.3.0)
-      middleman-cli (= 4.4.3)
-      middleman-core (= 4.4.3)
+      middleman-cli (= 4.5.0)
+      middleman-core (= 4.5.0)
     middleman-autoprefixer (3.0.0)
       autoprefixer-rails (~> 10.0)
       middleman-core (>= 4.0.0)
-    middleman-cli (4.4.3)
+    middleman-cli (4.5.0)
       thor (>= 0.17.0, < 2.0)
-    middleman-core (4.4.3)
+    middleman-core (4.5.0)
       activesupport (>= 6.1, < 7.1)
       addressable (~> 2.4)
       backports (~> 3.6)
@@ -105,7 +106,7 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redcarpet (3.6.0)
-    rexml (3.2.5)
+    rexml (3.2.6)
     rouge (3.30.0)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
@@ -118,8 +119,8 @@ GEM
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    temple (0.9.1)
-    thor (1.2.1)
+    temple (0.10.3)
+    thor (1.3.0)
     tilt (2.0.11)
     toml (0.3.0)
       parslet (>= 1.8.0, < 3.0.0)