Fix cloudflare_proxy conditional to use bool filter

The cloudflare_proxy variable is set as a host variable in INI inventory
files generated by Terraform. INI inventory treats all values as strings,
so `cloudflare_proxy=true` arrives as the string "True". Newer Ansible
versions enforce that `when:` conditionals must evaluate to actual
booleans, causing a fatal error.

Adding `| bool` filter converts the string to a proper boolean.

Author: TheLastCicada

climate-nginx-base/tasks/main.yml

@@ -68,15 +68,15 @@
     src: cloudflare-update-ip-ranges.sh
     dest: /usr/local/bin/cloudflare-update-ip-ranges.sh
     mode: '0755'
-  when: cloudflare_proxy
+  when: cloudflare_proxy | bool
   tags: climate-nginx-base
 
 # Run Cloudflare IP address retrieval script if proxying through cloudflare
 - name: Run Cloudflare IP address retrieval script
   become: true
   ansible.builtin.shell:
     cmd: /usr/local/bin/cloudflare-update-ip-ranges.sh
-  when: cloudflare_proxy
+  when: cloudflare_proxy | bool
   tags: climate-nginx-base
 
 # If proxying through cloudflare, set crontab to run the cloudflare-update-ip-ranges.sh script once a week
@@ -90,7 +90,7 @@
     day: "*"
     month: "*"
     weekday: "1"
-  when: cloudflare_proxy
+  when: cloudflare_proxy | bool
   tags: climate-nginx-base
 
 # Remove blocklist file if nginx_blocklist is empty