Shorten CTA wording for reviewers, voting, and planning (#1006)

Closes #999
Made them all fit into three lines as well 😅

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: hypha

src/content/deadlines/01_questionnaire.md

@@ -1,10 +1,9 @@
 ---
 title: Planning Survey
-subtitle: Share Your Ideas for EP 2025
+subtitle: Share Your Ideas for EP2025
 url: https://forms.gle/riw6CvML8ck94A4V9
 image: "./planning-survey.jpg"
 ---
 
-Your ideas matter! Help us shape EuroPython 2025 by sharing your thoughts and
-suggestions in our planning survey. Your feedback will help us create a
-conference that meets the needs and interests of our community.
+Have ideas to make EuroPython 2025 better? Share them with us and help build a
+conference that works for **YOU**!

src/content/deadlines/02_reviewer.md

@@ -5,6 +5,5 @@ url: https://forms.gle/4GTJjwZ1nHBGetM18
 image: mentorship1.jpg
 ---
 
-Join our team of reviewers to share **YOUR** feedback and help shape a diverse,
-balanced and high-quality programme. Your knowledge and insights make a
-difference: be part of creating a great conference!
+Join the team to review talk proposals! **YOUR** feedback helps us create a
+diverse and high-quality programme.

src/content/deadlines/03_voting.md

@@ -5,5 +5,5 @@ url: /programme/voting/
 image: voting.jpg
 ---
 
-Vote for the talks **YOU** would like to see at EuroPython 2025. We are a
-community conference and your votes help shape the programme!
+Vote for the talks **YOU** would like to see! We are a community conference and
+your votes help shape the programme.