CI: run workflows when their config files change

Adds each of the workflow config files to their own `on`..`paths:` so
changes to a workflow's configuration run the respective workflow.

.github/workflows/aes-gcm-siv.yml

@@ -3,6 +3,7 @@ name: aes-gcm-siv
 on:
   pull_request:
     paths:
+      - ".github/workflows/aes-gcm-siv.yml"
       - "aes-gcm-siv/**"
       - "Cargo.*"
   push:

.github/workflows/aes-siv.yml

@@ -3,6 +3,7 @@ name: aes-siv
 on:
   pull_request:
     paths:
+      - ".github/workflows/aes-siv.yml"
       - "aes-siv/**"
       - "Cargo.*"
   push:

.github/workflows/benches.yml

@@ -3,6 +3,7 @@ name: benches
 on:
   pull_request:
     paths:
+      - ".github/workflows/benches.yml"
       - "benches/**"
       - "Cargo.*"
   push:

.github/workflows/ccm.yml

@@ -3,6 +3,7 @@ name: ccm
 on:
   pull_request:
     paths:
+      - ".github/workflows/ccm.yml"
       - "ccm/**"
       - "Cargo.*"
   push:

.github/workflows/chacha20poly1305.yml

@@ -3,6 +3,7 @@ name: chacha20poly1305
 on:
   pull_request:
     paths:
+      - ".github/workflows/chacha20poly1305.yml"
       - "chacha20poly1305/**"
       - "Cargo.*"
   push:

.github/workflows/deoxys.yml

@@ -3,6 +3,7 @@ name: deoxys
 on:
   pull_request:
     paths:
+      - ".github/workflows/deoxys.yml"
       - "deoxys/**"
       - "Cargo.*"
   push:

.github/workflows/eax.yml

@@ -3,6 +3,7 @@ name: eax
 on:
   pull_request:
     paths:
+      - ".github/workflows/eax.yml"
       - "eax/**"
       - "Cargo.*"
   push:

.github/workflows/mgm.yml

@@ -3,6 +3,7 @@ name: mgm
 on:
   pull_request:
     paths:
+      - ".github/workflows/mgm.yml"
       - "mgm/**"
       - "Cargo.*"
   push: