Change all tags from workflows to pinned SHAs

[RyanH-STFC]

• Change all of the tags in the repo to pinned SHAs as it is best practice as a defence against supply chain attacks

Description:

---

Submitter:

Have you done the following?:

• Labeled the pull request from the following? major | minor | patch or documentation | workflow
• Updated the documentation?
• Added unit tests for new / untested code?
• Deployed the changes onto dev-chatops.nubes.rl.ac.uk?

New / Existing features:

• Written integration tests?
• Configured the Slack Application with new commands or permission scope changes?
• Updated the version.txt and docker-compose.yml files?

---

Reviewer:

Have you checked the following?:

• Version change is appropriate to the code changes? Semantic versioning documentation here
• Unit test code coverage is acceptable?
• Do the CI jobs pass?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.24%. Comparing base (cae7371) to head (8373ba9).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #152      +/-   ##
==========================================
- Coverage   99.79%   97.24%   -2.56%     
==========================================
  Files          20       16       -4     
  Lines         984     1198     +214     
==========================================
+ Hits          982     1165     +183     
- Misses          2       33      +31     

Flag	Coverage Δ
rabbit_consumer	97.24% <ø> (?)

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