Propose spelling correction to the readme

[jeis2497052]

I would like to propose a few spelling corrections to variables, Additionally listed below:

diff --git a/README.md b/README.md
index 08a9457..88f091b 100644
--- a/README.md
+++ b/README.md
@@ -178,8 +178,8 @@ The example above will look for the job configs in
 
 The role will also look for `{{ playbook_dir }}/jenkins-configs/config.xml`
 These config.xml will be templated over to the server to be used as the job cfi
guration.                                                                      
-It will upload the whole secrets directory under `{{ playbook_dir }}/jenkins-nf
igs/secrets` and configure custom files provided under `{{ jenkins_custom_files 
}}` variable. Note that `{{ jenkins_include_secrets }}` and `{{ jenkins_include_
custom_files }}` varibales should be set to true for these to work.            
-Additionaly the role can install custom plugins by providing the .jpi or .hpiil
es as a list under `{{ jenkins_custom_plugins }}` variable.                    
+It will upload the whole secrets directory under `{{ playbook_dir }}/jenkins-nf
igs/secrets` and configure custom files provided under `{{ jenkins_custom_files 
}}` variable. Note that `{{ jenkins_include_secrets }}` and `{{ jenkins_include_
custom_files }}` variables should be set to true for these to work.            
+Additionally the role can install custom plugins by providing the .jpi or .hpfi
les as a list under `{{ jenkins_custom_plugins }}` variable.                   
 
 config.xml and custom files are templated so you can put variables in them,
 for example it would be a good idea to encrypt sensitive variables

Expected Behavior

Actual Behavior

Steps to Reproduce the Problem

[emmetog]

Hi @jeis2497052 ! Thanks for flagging this. If you're up for creating a PR I'd gladly merge it.

Thanks!