Bump pins in README (#103)

Signed-off-by: William Woodruff <[email protected]>

Author: woodruffw

README.md

@@ -85,7 +85,7 @@ jobs:
           persist-credentials: false
 
       - name: Run zizmor 🌈
-        uses: zizmorcore/zizmor-action@71321a20a9ded102f6e9ce5718a2fcec2c4f70d8 # v0.5.2
+        uses: zizmorcore/zizmor-action@b1d7e1fb5de872772f31590499237e7cce841e8e # v0.5.3
 ```
 
 ### Usage without Github Advanced Security
@@ -120,7 +120,7 @@ jobs:
           persist-credentials: false
 
       - name: Run zizmor 🌈
-        uses: zizmorcore/zizmor-action@71321a20a9ded102f6e9ce5718a2fcec2c4f70d8 # v0.5.2
+        uses: zizmorcore/zizmor-action@b1d7e1fb5de872772f31590499237e7cce841e8e # v0.5.3
         with:
           advanced-security: false
 ```
@@ -140,7 +140,7 @@ repositories:
 
 ```yaml
 - name: Run zizmor 🌈
-  uses: zizmorcore/zizmor-action@71321a20a9ded102f6e9ce5718a2fcec2c4f70d8 # v0.5.2
+  uses: zizmorcore/zizmor-action@b1d7e1fb5de872772f31590499237e7cce841e8e # v0.5.3
   with:
     inputs: |
       .github/workflows/fishy.yml