fix: lock down sharp to v0.32.6 due to installation errors in AWS lambda

[jsdalton]

Purpose

• Sharp introduced a new installation packaging set up where they distribute prebuilt binaries. Details here Enhancement: Major overhaul of installation lovell/sharp#3750. This was released in v0.33.0 which we upgraded to (via dependabot) a few days ago.
• The change broke the image generator with the following errors:

Error: Could not load the \"sharp\" module using the linux-x64 runtime
Possible solutions:
- Add platform-specific dependencies:
    npm install --os=linux --cpu=x64 sharp
  or
    npm install --force @img/sharp-linux-x64
- Consult the installation documentation: https://sharp.pixelplumbing.com/install
    at Object.<anonymous> (/var/task/7dFRjNacIIBFc6CVoVP822/node_modules/sharp/lib/sharp.js:85:9)
    at Module._compile (node:internal/modules/cjs/loader:1256:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1310:10)
    at Module.load (node:internal/modules/cjs/loader:1119:32)
    at Module._load (node:internal/modules/cjs/loader:960:12)
    at Module.require (node:internal/modules/cjs/loader:1143:19)
    at require (node:internal/modules/cjs/helpers:119:18)
    at Object.<anonymous> (/var/task/7dFRjNacIIBFc6CVoVP822/node_modules/sharp/lib/constructor.js:10:1)
    at Module._compile (node:internal/modules/cjs/loader:1256:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1310:10)"

Approach

• Downgrade and pin to 0.32.6 until we can get the installation working
• Local testing was not successful thus far

Testing steps

• Tested old version locally in sandbox and it worked

Breaking Changes

Dependencies and/or References

Deployment

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[matthew-gordon]

LGTM