Update pull request template with security section

[coverbeck]

Description
Update pull request template with security header

Review Instructions
When you create a PR, you should see a security header.

Issue
https://ucsc-cgl.atlassian.net/browse/SEAB-5077

Please make sure that you've checked the following before submitting your pull request. Thanks!

• Check that you pass the basic style checks and unit tests by running mvn clean install
• Ensure that the PR targets the correct branch. Check the milestone or fix version of the ticket.
• Follow the existing JPA patterns for queries, using named parameters, to avoid SQL injection
• If you are changing dependencies, check the Snyk status check or the dashboard to ensure you are not introducing new high/critical vulnerabilities
• Assume that inputs to the API can be malicious, and sanitize and/or check for Denial of Service type values, e.g., massive sizes
• Do not serve user-uploaded binary images through the Dockstore API
• Ensure that endpoints that only allow privileged access enforce that with the @RolesAllowed annotation
• Do not create cookies, although this may change in the future
• If this PR is for a user-facing feature, create and link a documentation ticket for this feature (usually in the same milestone as the linked issue). Style points if you create a documentation PR directly and link that instead.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[codecov]

Codecov Report

Base: 73.54% // Head: 73.53% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (d662198) compared to base (fa76e2a).
Patch has no changes to coverable lines.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #5289      +/-   ##
=============================================
- Coverage      73.54%   73.53%   -0.02%     
+ Complexity      4471     4469       -2     
=============================================
  Files            296      296              
  Lines          16914    16914              
  Branches        1862     1862              
=============================================
- Hits           12440    12438       -2     
  Misses          3590     3590              
- Partials         884      886       +2     

Flag	Coverage Δ
bitbuckettests	28.33% <ø> (ø)
integrationtests	58.34% <ø> (-0.02%)	⬇️
languageparsingtests	10.83% <ø> (ø)
toolintegrationtests	30.48% <ø> (ø)
unit-tests_and_non-confidential-tests	27.16% <ø> (ø)
workflowintegrationtests	40.67% <ø> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...store/webservice/resources/DockerRepoResource.java	77.24% <0.00%> (-0.23%)	⬇️
...ckstore/webservice/resources/WorkflowResource.java	71.07% <0.00%> (-0.14%)	⬇️

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