Fix Release Pipeline (#38)

# PR
## Proposal
Update pipeline runner to jammy so charmcraft can build the charm. 

## Context
Currently, the charm [can't be released](https://github.com/canonical/pgbouncer-operator/actions/runs/3487511396/jobs/5838224654) because there's no good base on which to build the charm. Building a charm on jammy seems to require a jammy substrate, so I've updated the CI to use 22.04

## Testing
- I've tested this locally, and I'm currently testing building and running a jammy charm in a 20.04 VM.  
- I'm struggling on how to verify the release action locally, so if anyone has any ideas I'd appreciate it :) 

## Commits
* updated pipeline runner to jammy

* updated build and run lxd versions

* reverted build to 22.04

.github/workflows/ci.yaml

@@ -6,7 +6,7 @@ on:
 jobs:
   lint:
     name: Lint
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -17,7 +17,7 @@ jobs:
 
   unit-test:
     name: Unit tests
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -31,7 +31,7 @@ jobs:
     needs:
       - lint
       - unit-test
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -48,7 +48,7 @@ jobs:
     needs:
       - lint
       - unit-test
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -65,7 +65,7 @@ jobs:
     needs:
       - lint
       - unit-test
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -83,7 +83,7 @@ jobs:
     needs:
       - lint
       - unit-test
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v3

.github/workflows/release.yaml

@@ -8,7 +8,7 @@ on:
 jobs:
   lib-check:
     name: Check libraries
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -30,10 +30,10 @@ jobs:
     needs:
       - lib-check
       - ci
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
       - name: Select charmhub channel