chore: Increase pg max connections property for CI (#33923)

## Description
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> _Add a TL;DR when the description is longer than 500 words or
extremely technical (helps the content, marketing, and DevRel team)._
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> _Please also include relevant motivation and context. List any
dependencies that are required for this change. Add links to Notion,
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Fixes #`Issue Number`  
_or_  
Fixes `Issue URL`
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> _If no issue exists, please create an issue first, and check with the
maintainers if the issue is valid._

## Automation

/ok-to-test tags=""

### 🔍 Cypress test results
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> If you modify the content in this section, you are likely to disrupt
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## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [ ] No

Co-authored-by: Trisha Anand <trisha@appsmith.com>
Co-authored-by: yatinappsmith <84702014+yatinappsmith@users.noreply.github.com>

.github/workflows/server-build.yml

@@ -141,7 +141,7 @@ jobs:
       - name: Conditionally start PostgreSQL
         run: |
           if [[ inputs.is-pg-build == 'true' ]]; then
-            docker run --name appsmith-pg -p 5432:5432 -d -e POSTGRES_PASSWORD=password postgres:alpine
+            docker run --name appsmith-pg -p 5432:5432 -d -e POSTGRES_PASSWORD=password postgres:alpine postgres -N 1500
           fi
 
       # Retrieve maven dependencies from cache. After a successful run, these dependencies are cached again